1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return false; 443 return hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 bool hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return false; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return true; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 bool hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return false; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 bool hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return false; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 bool hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 bool hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 bool hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 bool hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return false; 701 } 702 hci_stack->hci_packet_buffer_reserved = true; 703 return true; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = false; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 uint8_t status = ERROR_CODE_SUCCESS; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 if (err != 0){ 781 // no error from HCI Transport expected 782 status = ERROR_CODE_HARDWARE_FAILURE; 783 } 784 785 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 786 787 // done yet? 788 if (!more_fragments) break; 789 790 // can send more? 791 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 792 } 793 794 log_debug("hci_send_acl_packet_fragments loop over"); 795 796 // release buffer now for synchronous transport 797 if (hci_transport_synchronous()){ 798 hci_stack->acl_fragmentation_tx_active = 0; 799 hci_release_packet_buffer(); 800 hci_emit_transport_packet_sent(); 801 } 802 803 return status; 804 } 805 806 // pre: caller has reserved the packet buffer 807 uint8_t hci_send_acl_packet_buffer(int size){ 808 btstack_assert(hci_stack->hci_packet_buffer_reserved); 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 815 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 hci_connection_t *connection = hci_connection_for_handle( con_handle); 822 if (!connection) { 823 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 827 } 828 829 #ifdef ENABLE_CLASSIC 830 hci_connection_timestamp(connection); 831 #endif 832 833 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 834 835 // setup data 836 hci_stack->acl_fragmentation_total_size = size; 837 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 838 839 return hci_send_acl_packet_fragments(connection); 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // pre: caller has reserved the packet buffer 844 uint8_t hci_send_sco_packet_buffer(int size){ 845 btstack_assert(hci_stack->hci_packet_buffer_reserved); 846 847 uint8_t * packet = hci_stack->hci_packet_buffer; 848 849 // skip checks in loopback mode 850 if (!hci_stack->loopback_mode){ 851 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 852 853 // check for free places on Bluetooth module 854 if (!hci_can_send_prepared_sco_packet_now()) { 855 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 return BTSTACK_ACL_BUFFERS_FULL; 859 } 860 861 // track send packet in connection struct 862 hci_connection_t *connection = hci_connection_for_handle( con_handle); 863 if (!connection) { 864 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 865 hci_release_packet_buffer(); 866 hci_emit_transport_packet_sent(); 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 870 if (hci_have_usb_transport()){ 871 // token used 872 hci_stack->sco_can_send_now = false; 873 } else { 874 if (hci_stack->synchronous_flow_control_enabled){ 875 connection->num_packets_sent++; 876 } else { 877 connection->sco_tx_ready--; 878 } 879 } 880 } 881 882 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 883 884 #ifdef HAVE_SCO_TRANSPORT 885 hci_stack->sco_transport->send_packet(packet, size); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 889 return 0; 890 #else 891 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 892 if (hci_transport_synchronous()){ 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 } 896 897 if (err != 0){ 898 return ERROR_CODE_HARDWARE_FAILURE; 899 } 900 return ERROR_CODE_SUCCESS; 901 #endif 902 } 903 #endif 904 905 static void acl_handler(uint8_t *packet, uint16_t size){ 906 907 // get info 908 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 909 hci_connection_t *conn = hci_connection_for_handle(con_handle); 910 uint8_t acl_flags = READ_ACL_FLAGS(packet); 911 uint16_t acl_length = READ_ACL_LENGTH(packet); 912 913 // ignore non-registered handle 914 if (!conn){ 915 log_error("acl_handler called with non-registered handle %u!" , con_handle); 916 return; 917 } 918 919 // assert packet is complete 920 if ((acl_length + 4u) != size){ 921 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 922 return; 923 } 924 925 #ifdef ENABLE_CLASSIC 926 // update idle timestamp 927 hci_connection_timestamp(conn); 928 #endif 929 930 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 931 hci_stack->host_completed_packets = 1; 932 conn->num_packets_completed++; 933 #endif 934 935 // handle different packet types 936 switch (acl_flags & 0x03u) { 937 938 case 0x01: // continuation fragment 939 940 // sanity checks 941 if (conn->acl_recombination_pos == 0u) { 942 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 943 return; 944 } 945 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 946 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 947 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 948 conn->acl_recombination_pos = 0; 949 return; 950 } 951 952 // append fragment payload (header already stored) 953 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 954 &packet[4], acl_length); 955 conn->acl_recombination_pos += acl_length; 956 957 // forward complete L2CAP packet if complete. 958 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 959 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 960 // reset recombination buffer 961 conn->acl_recombination_length = 0; 962 conn->acl_recombination_pos = 0; 963 } 964 break; 965 966 case 0x02: { // first fragment 967 968 // sanity check 969 if (conn->acl_recombination_pos) { 970 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 971 conn->acl_recombination_pos = 0; 972 } 973 974 // peek into L2CAP packet! 975 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 976 977 // compare fragment size to L2CAP packet size 978 if (acl_length >= (l2cap_length + 4u)){ 979 // forward fragment as L2CAP packet 980 hci_emit_acl_packet(packet, acl_length + 4u); 981 } else { 982 983 if (acl_length > HCI_ACL_BUFFER_SIZE){ 984 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 985 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 986 return; 987 } 988 989 // store first fragment and tweak acl length for complete package 990 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 991 packet, acl_length + 4u); 992 conn->acl_recombination_pos = acl_length + 4u; 993 conn->acl_recombination_length = l2cap_length; 994 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 995 } 996 break; 997 998 } 999 default: 1000 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1001 return; 1002 } 1003 1004 // execute main loop 1005 hci_run(); 1006 } 1007 1008 static void hci_connection_stop_timer(hci_connection_t * conn){ 1009 btstack_run_loop_remove_timer(&conn->timeout); 1010 #ifdef ENABLE_CLASSIC 1011 btstack_run_loop_remove_timer(&conn->timeout_sco); 1012 #endif 1013 } 1014 1015 static void hci_shutdown_connection(hci_connection_t *conn){ 1016 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1017 1018 #ifdef ENABLE_CLASSIC 1019 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1020 bd_addr_type_t addr_type = conn->address_type; 1021 #endif 1022 #ifdef HAVE_SCO_TRANSPORT 1023 hci_con_handle_t con_handle = conn->con_handle; 1024 #endif 1025 #endif 1026 1027 hci_connection_stop_timer(conn); 1028 1029 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1030 btstack_memory_hci_connection_free( conn ); 1031 1032 // now it's gone 1033 hci_emit_nr_connections_changed(); 1034 1035 #ifdef ENABLE_CLASSIC 1036 #ifdef ENABLE_SCO_OVER_HCI 1037 // update SCO 1038 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1039 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1040 } 1041 #endif 1042 #ifdef HAVE_SCO_TRANSPORT 1043 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1044 hci_stack->sco_transport->close(con_handle); 1045 } 1046 #endif 1047 #endif 1048 } 1049 1050 #ifdef ENABLE_CLASSIC 1051 1052 static const uint16_t packet_type_sizes[] = { 1053 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1054 HCI_ACL_DH1_SIZE, 0, 0, 0, 1055 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1056 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1057 }; 1058 static const uint8_t packet_type_feature_requirement_bit[] = { 1059 0, // 3 slot packets 1060 1, // 5 slot packets 1061 25, // EDR 2 mpbs 1062 26, // EDR 3 mbps 1063 39, // 3 slot EDR packts 1064 40, // 5 slot EDR packet 1065 }; 1066 static const uint16_t packet_type_feature_packet_mask[] = { 1067 0x0f00, // 3 slot packets 1068 0xf000, // 5 slot packets 1069 0x1102, // EDR 2 mpbs 1070 0x2204, // EDR 3 mbps 1071 0x0300, // 3 slot EDR packts 1072 0x3000, // 5 slot EDR packet 1073 }; 1074 1075 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1076 // enable packet types based on size 1077 uint16_t packet_types = 0; 1078 unsigned int i; 1079 for (i=0;i<16;i++){ 1080 if (packet_type_sizes[i] == 0) continue; 1081 if (packet_type_sizes[i] <= buffer_size){ 1082 packet_types |= 1 << i; 1083 } 1084 } 1085 // disable packet types due to missing local supported features 1086 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1087 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1088 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1089 if (feature_set) continue; 1090 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1091 packet_types &= ~packet_type_feature_packet_mask[i]; 1092 } 1093 // flip bits for "may not be used" 1094 packet_types ^= 0x3306; 1095 return packet_types; 1096 } 1097 1098 uint16_t hci_usable_acl_packet_types(void){ 1099 return hci_stack->packet_types; 1100 } 1101 #endif 1102 1103 uint8_t* hci_get_outgoing_packet_buffer(void){ 1104 // hci packet buffer is >= acl data packet length 1105 return hci_stack->hci_packet_buffer; 1106 } 1107 1108 uint16_t hci_max_acl_data_packet_length(void){ 1109 return hci_stack->acl_data_packet_length; 1110 } 1111 1112 #ifdef ENABLE_CLASSIC 1113 bool hci_extended_sco_link_supported(void){ 1114 // No. 31, byte 3, bit 7 1115 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1116 } 1117 #endif 1118 1119 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1120 // No. 54, byte 6, bit 6 1121 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1122 } 1123 1124 static int gap_ssp_supported(void){ 1125 // No. 51, byte 6, bit 3 1126 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1127 } 1128 1129 static int hci_classic_supported(void){ 1130 #ifdef ENABLE_CLASSIC 1131 // No. 37, byte 4, bit 5, = No BR/EDR Support 1132 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1133 #else 1134 return 0; 1135 #endif 1136 } 1137 1138 static int hci_le_supported(void){ 1139 #ifdef ENABLE_BLE 1140 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1141 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1142 #else 1143 return 0; 1144 #endif 1145 } 1146 1147 #ifdef ENABLE_BLE 1148 1149 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1150 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1151 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1152 } else { 1153 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1154 } 1155 } 1156 1157 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1158 *addr_type = hci_stack->le_own_addr_type; 1159 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1160 } 1161 1162 #ifdef ENABLE_LE_PERIPHERAL 1163 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1164 *addr_type = hci_stack->le_advertisements_own_addr_type; 1165 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1166 }; 1167 #endif 1168 1169 #ifdef ENABLE_LE_CENTRAL 1170 1171 /** 1172 * @brief Get own addr type and address used for LE connections (Central) 1173 */ 1174 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1175 *addr_type = hci_stack->le_connection_own_addr_type; 1176 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1177 } 1178 1179 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1180 1181 int offset = 3; 1182 int num_reports = packet[offset]; 1183 offset += 1; 1184 1185 int i; 1186 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1187 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1188 for (i=0; (i<num_reports) && (offset < size);i++){ 1189 // sanity checks on data_length: 1190 uint8_t data_length = packet[offset + 8]; 1191 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1192 if ((offset + 9u + data_length + 1u) > size) return; 1193 // setup event 1194 uint8_t event_size = 10u + data_length; 1195 int pos = 0; 1196 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1197 event[pos++] = event_size; 1198 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1199 offset += 8; 1200 pos += 8; 1201 event[pos++] = packet[offset + 1 + data_length]; // rssi 1202 event[pos++] = data_length; 1203 offset++; 1204 (void)memcpy(&event[pos], &packet[offset], data_length); 1205 pos += data_length; 1206 offset += data_length + 1u; // rssi 1207 hci_emit_event(event, pos, 1); 1208 } 1209 } 1210 #endif 1211 #endif 1212 1213 #ifdef ENABLE_BLE 1214 #ifdef ENABLE_LE_PERIPHERAL 1215 static void hci_update_advertisements_enabled_for_current_roles(void){ 1216 if (hci_stack->le_advertisements_enabled){ 1217 // get number of active le slave connections 1218 int num_slave_connections = 0; 1219 btstack_linked_list_iterator_t it; 1220 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1221 while (btstack_linked_list_iterator_has_next(&it)){ 1222 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1223 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1224 if (con->state != OPEN) continue; 1225 if (con->role != HCI_ROLE_SLAVE) continue; 1226 if (!hci_is_le_connection(con)) continue; 1227 num_slave_connections++; 1228 } 1229 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1230 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1231 } else { 1232 hci_stack->le_advertisements_enabled_for_current_roles = false; 1233 } 1234 } 1235 #endif 1236 #endif 1237 1238 #ifdef ENABLE_CLASSIC 1239 static void gap_run_set_local_name(void){ 1240 hci_reserve_packet_buffer(); 1241 uint8_t * packet = hci_stack->hci_packet_buffer; 1242 // construct HCI Command and send 1243 uint16_t opcode = hci_write_local_name.opcode; 1244 hci_stack->last_cmd_opcode = opcode; 1245 packet[0] = opcode & 0xff; 1246 packet[1] = opcode >> 8; 1247 packet[2] = DEVICE_NAME_LEN; 1248 memset(&packet[3], 0, DEVICE_NAME_LEN); 1249 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1250 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1251 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1252 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1253 // expand '00:00:00:00:00:00' in name with bd_addr 1254 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1255 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1256 } 1257 1258 static void gap_run_set_eir_data(void){ 1259 hci_reserve_packet_buffer(); 1260 uint8_t * packet = hci_stack->hci_packet_buffer; 1261 // construct HCI Command in-place and send 1262 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1263 hci_stack->last_cmd_opcode = opcode; 1264 uint16_t offset = 0; 1265 packet[offset++] = opcode & 0xff; 1266 packet[offset++] = opcode >> 8; 1267 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1268 packet[offset++] = 0; // FEC not required 1269 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1270 if (hci_stack->eir_data){ 1271 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1272 ad_context_t context; 1273 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1274 uint8_t data_type = ad_iterator_get_data_type(&context); 1275 uint8_t size = ad_iterator_get_data_len(&context); 1276 const uint8_t *data = ad_iterator_get_data(&context); 1277 // copy item 1278 packet[offset++] = size + 1; 1279 packet[offset++] = data_type; 1280 memcpy(&packet[offset], data, size); 1281 // update name item 1282 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1283 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1284 } 1285 offset += size; 1286 } 1287 } else { 1288 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1289 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1290 packet[offset++] = bytes_to_copy + 1; 1291 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1292 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1293 // expand '00:00:00:00:00:00' in name with bd_addr 1294 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1295 } 1296 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1297 } 1298 #endif 1299 1300 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1301 1302 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1303 if (!hci_stack->config) return 0; 1304 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1305 // Limit baud rate for Broadcom chipsets to 3 mbps 1306 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1307 baud_rate = 3000000; 1308 } 1309 return baud_rate; 1310 } 1311 1312 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1313 UNUSED(ds); 1314 1315 switch (hci_stack->substate){ 1316 case HCI_INIT_W4_SEND_RESET: 1317 log_info("Resend HCI Reset"); 1318 hci_stack->substate = HCI_INIT_SEND_RESET; 1319 hci_stack->num_cmd_packets = 1; 1320 hci_run(); 1321 break; 1322 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1323 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1324 if (hci_stack->hci_transport->reset_link){ 1325 hci_stack->hci_transport->reset_link(); 1326 } 1327 1328 /* fall through */ 1329 1330 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1331 log_info("Resend HCI Reset - CSR Warm Boot"); 1332 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1333 hci_stack->num_cmd_packets = 1; 1334 hci_run(); 1335 break; 1336 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1337 if (hci_stack->hci_transport->set_baudrate){ 1338 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1339 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1340 hci_stack->hci_transport->set_baudrate(baud_rate); 1341 } 1342 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1343 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1344 if (hci_stack->hci_transport->reset_link){ 1345 log_info("Link Reset"); 1346 hci_stack->hci_transport->reset_link(); 1347 } 1348 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1349 hci_run(); 1350 } 1351 break; 1352 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1353 // otherwise continue 1354 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1355 hci_send_cmd(&hci_read_local_supported_commands); 1356 break; 1357 default: 1358 break; 1359 } 1360 } 1361 #endif 1362 1363 static void hci_initializing_next_state(void){ 1364 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1365 } 1366 1367 // assumption: hci_can_send_command_packet_now() == true 1368 static void hci_initializing_run(void){ 1369 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1370 switch (hci_stack->substate){ 1371 case HCI_INIT_SEND_RESET: 1372 hci_state_reset(); 1373 1374 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1375 // prepare reset if command complete not received in 100ms 1376 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1377 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1378 btstack_run_loop_add_timer(&hci_stack->timeout); 1379 #endif 1380 // send command 1381 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1382 hci_send_cmd(&hci_reset); 1383 break; 1384 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1385 hci_send_cmd(&hci_read_local_version_information); 1386 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1387 break; 1388 case HCI_INIT_SEND_READ_LOCAL_NAME: 1389 hci_send_cmd(&hci_read_local_name); 1390 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1391 break; 1392 1393 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1394 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1395 hci_state_reset(); 1396 // prepare reset if command complete not received in 100ms 1397 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1398 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1399 btstack_run_loop_add_timer(&hci_stack->timeout); 1400 // send command 1401 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1402 hci_send_cmd(&hci_reset); 1403 break; 1404 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1405 hci_state_reset(); 1406 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1407 hci_send_cmd(&hci_reset); 1408 break; 1409 case HCI_INIT_SEND_BAUD_CHANGE: { 1410 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1411 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1412 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1413 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1414 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1415 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1416 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1417 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1418 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1419 btstack_run_loop_add_timer(&hci_stack->timeout); 1420 } 1421 break; 1422 } 1423 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1424 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1425 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1426 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1427 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1428 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1429 break; 1430 } 1431 case HCI_INIT_CUSTOM_INIT: 1432 // Custom initialization 1433 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1434 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1435 bool send_cmd = false; 1436 switch (hci_stack->chipset_result){ 1437 case BTSTACK_CHIPSET_VALID_COMMAND: 1438 send_cmd = true; 1439 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1440 break; 1441 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1442 send_cmd = true; 1443 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1444 log_info("CSR Warm Boot"); 1445 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1446 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1447 btstack_run_loop_add_timer(&hci_stack->timeout); 1448 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1449 && hci_stack->config 1450 && hci_stack->chipset 1451 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1452 && hci_stack->hci_transport->set_baudrate 1453 && hci_transport_uart_get_main_baud_rate()){ 1454 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1455 } else { 1456 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1457 } 1458 break; 1459 default: 1460 break; 1461 } 1462 1463 if (send_cmd){ 1464 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1465 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1466 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1467 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1468 break; 1469 } 1470 log_info("Init script done"); 1471 1472 // Init script download on Broadcom chipsets causes: 1473 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1474 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1475 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1476 1477 // - baud rate to reset, restore UART baud rate if needed 1478 int need_baud_change = hci_stack->config 1479 && hci_stack->chipset 1480 && hci_stack->chipset->set_baudrate_command 1481 && hci_stack->hci_transport->set_baudrate 1482 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1483 if (need_baud_change) { 1484 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1485 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1486 hci_stack->hci_transport->set_baudrate(baud_rate); 1487 } 1488 1489 uint16_t bcm_delay_ms = 300; 1490 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1491 // -> Work around: wait here. 1492 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1493 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1494 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1495 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1496 btstack_run_loop_add_timer(&hci_stack->timeout); 1497 break; 1498 } 1499 } 1500 // otherwise continue 1501 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1502 hci_send_cmd(&hci_read_local_supported_commands); 1503 break; 1504 case HCI_INIT_SET_BD_ADDR: 1505 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1506 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1507 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1508 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1509 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1510 break; 1511 #endif 1512 1513 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1514 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1515 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1516 hci_send_cmd(&hci_read_local_supported_commands); 1517 break; 1518 case HCI_INIT_READ_BD_ADDR: 1519 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1520 hci_send_cmd(&hci_read_bd_addr); 1521 break; 1522 case HCI_INIT_READ_BUFFER_SIZE: 1523 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1524 hci_send_cmd(&hci_read_buffer_size); 1525 break; 1526 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1527 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1528 hci_send_cmd(&hci_read_local_supported_features); 1529 break; 1530 1531 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1532 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1533 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1534 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1535 break; 1536 case HCI_INIT_HOST_BUFFER_SIZE: 1537 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1538 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1539 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1540 break; 1541 #endif 1542 1543 case HCI_INIT_SET_EVENT_MASK: 1544 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1545 if (hci_le_supported()){ 1546 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1547 } else { 1548 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1549 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1550 } 1551 break; 1552 1553 #ifdef ENABLE_CLASSIC 1554 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1555 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1556 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1557 break; 1558 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1559 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1560 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1561 break; 1562 case HCI_INIT_WRITE_INQUIRY_MODE: 1563 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1564 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1565 break; 1566 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1567 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1568 hci_stack->secure_connections_active = true; 1569 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1570 break; 1571 case HCI_INIT_WRITE_SCAN_ENABLE: 1572 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1573 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1574 break; 1575 // only sent if ENABLE_SCO_OVER_HCI is defined 1576 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1577 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1578 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1579 break; 1580 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1581 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1582 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1583 break; 1584 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1585 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1586 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1587 #ifdef ENABLE_SCO_OVER_HCI 1588 log_info("BCM: Route SCO data via HCI transport"); 1589 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1590 #endif 1591 #ifdef ENABLE_SCO_OVER_PCM 1592 log_info("BCM: Route SCO data via PCM interface"); 1593 #ifdef ENABLE_BCM_PCM_WBS 1594 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1596 #else 1597 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1598 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1599 #endif 1600 #endif 1601 break; 1602 #ifdef ENABLE_SCO_OVER_PCM 1603 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1604 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1605 log_info("BCM: Config PCM interface for I2S"); 1606 #ifdef ENABLE_BCM_PCM_WBS 1607 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1608 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1609 #else 1610 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1611 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1612 #endif 1613 break; 1614 #endif 1615 #endif 1616 1617 #ifdef ENABLE_BLE 1618 // LE INIT 1619 case HCI_INIT_LE_READ_BUFFER_SIZE: 1620 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1621 hci_send_cmd(&hci_le_read_buffer_size); 1622 break; 1623 case HCI_INIT_LE_SET_EVENT_MASK: 1624 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1625 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1626 break; 1627 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1628 // LE Supported Host = 1, Simultaneous Host = 0 1629 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1630 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1631 break; 1632 #endif 1633 1634 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1635 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1636 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1637 hci_send_cmd(&hci_le_read_maximum_data_length); 1638 break; 1639 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1640 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1641 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1642 break; 1643 #endif 1644 1645 #ifdef ENABLE_LE_CENTRAL 1646 case HCI_INIT_READ_WHITE_LIST_SIZE: 1647 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1648 hci_send_cmd(&hci_le_read_white_list_size); 1649 break; 1650 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1651 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1652 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1653 break; 1654 #endif 1655 default: 1656 return; 1657 } 1658 } 1659 1660 static void hci_init_done(void){ 1661 // done. tell the app 1662 log_info("hci_init_done -> HCI_STATE_WORKING"); 1663 hci_stack->state = HCI_STATE_WORKING; 1664 hci_emit_state(); 1665 hci_run(); 1666 } 1667 1668 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1669 bool command_completed = false; 1670 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1671 uint16_t opcode = little_endian_read_16(packet,3); 1672 if (opcode == hci_stack->last_cmd_opcode){ 1673 command_completed = true; 1674 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1675 } else { 1676 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1677 } 1678 } 1679 1680 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1681 uint8_t status = packet[2]; 1682 uint16_t opcode = little_endian_read_16(packet,4); 1683 if (opcode == hci_stack->last_cmd_opcode){ 1684 if (status){ 1685 command_completed = true; 1686 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1687 } else { 1688 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1689 } 1690 } else { 1691 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1692 } 1693 } 1694 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1695 // Vendor == CSR 1696 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1697 // TODO: track actual command 1698 command_completed = true; 1699 } 1700 1701 // Vendor == Toshiba 1702 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1706 hci_stack->num_cmd_packets = 1; 1707 } 1708 #endif 1709 1710 return command_completed; 1711 } 1712 1713 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1714 1715 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1716 1717 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1718 1719 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1720 1721 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1722 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1723 // 1724 // HCI Reset 1725 // Timeout 100 ms 1726 // HCI Reset 1727 // Command Complete Reset 1728 // HCI Read Local Version Information 1729 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1730 // hang... 1731 // 1732 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1733 if (!command_completed 1734 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1735 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1736 1737 uint16_t opcode = little_endian_read_16(packet,3); 1738 if (opcode == hci_reset.opcode){ 1739 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1740 return; 1741 } 1742 } 1743 1744 // CSR & H5 1745 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1746 if (!command_completed 1747 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1748 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1749 1750 uint16_t opcode = little_endian_read_16(packet,3); 1751 if (opcode == hci_reset.opcode){ 1752 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1753 return; 1754 } 1755 } 1756 1757 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1758 // fix: Correct substate and behave as command below 1759 if (command_completed){ 1760 switch (hci_stack->substate){ 1761 case HCI_INIT_SEND_RESET: 1762 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1763 break; 1764 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1765 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1766 break; 1767 default: 1768 break; 1769 } 1770 } 1771 1772 #endif 1773 1774 if (!command_completed) return; 1775 1776 bool need_baud_change = false; 1777 bool need_addr_change = false; 1778 1779 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1780 need_baud_change = hci_stack->config 1781 && hci_stack->chipset 1782 && hci_stack->chipset->set_baudrate_command 1783 && hci_stack->hci_transport->set_baudrate 1784 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1785 1786 need_addr_change = hci_stack->custom_bd_addr_set 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_bd_addr_command; 1789 #endif 1790 1791 switch(hci_stack->substate){ 1792 1793 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1794 case HCI_INIT_SEND_RESET: 1795 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1796 // fix: just correct substate and behave as command below 1797 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1798 btstack_run_loop_remove_timer(&hci_stack->timeout); 1799 break; 1800 case HCI_INIT_W4_SEND_RESET: 1801 btstack_run_loop_remove_timer(&hci_stack->timeout); 1802 break; 1803 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1804 log_info("Received local name, need baud change %d", (int) need_baud_change); 1805 if (need_baud_change){ 1806 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1807 return; 1808 } 1809 // skip baud change 1810 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1811 return; 1812 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1813 // for STLC2500D, baud rate change already happened. 1814 // for others, baud rate gets changed now 1815 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1816 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1817 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1818 hci_stack->hci_transport->set_baudrate(baud_rate); 1819 } 1820 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1821 return; 1822 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1823 btstack_run_loop_remove_timer(&hci_stack->timeout); 1824 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1825 return; 1826 case HCI_INIT_W4_CUSTOM_INIT: 1827 // repeat custom init 1828 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1829 return; 1830 #else 1831 case HCI_INIT_W4_SEND_RESET: 1832 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1833 return ; 1834 #endif 1835 1836 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1837 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1838 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1839 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1840 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1841 return; 1842 } 1843 if (need_addr_change){ 1844 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1845 return; 1846 } 1847 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1848 return; 1849 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1850 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1851 if (need_baud_change){ 1852 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1853 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1854 hci_stack->hci_transport->set_baudrate(baud_rate); 1855 } 1856 if (need_addr_change){ 1857 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1858 return; 1859 } 1860 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1861 return; 1862 case HCI_INIT_W4_SET_BD_ADDR: 1863 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1864 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1865 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1866 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1867 return; 1868 } 1869 // skipping st warm boot 1870 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1871 return; 1872 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1873 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1874 return; 1875 #endif 1876 case HCI_INIT_W4_READ_BD_ADDR: 1877 // only read buffer size if supported 1878 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1879 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1880 return; 1881 } 1882 // skipping read buffer size 1883 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1884 return; 1885 case HCI_INIT_W4_SET_EVENT_MASK: 1886 // skip Classic init commands for LE only chipsets 1887 if (!hci_classic_supported()){ 1888 #ifdef ENABLE_BLE 1889 if (hci_le_supported()){ 1890 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1891 return; 1892 } 1893 #endif 1894 log_error("Neither BR/EDR nor LE supported"); 1895 hci_init_done(); 1896 return; 1897 } 1898 if (!gap_ssp_supported()){ 1899 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1900 return; 1901 } 1902 break; 1903 #ifdef ENABLE_BLE 1904 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1905 // skip write le host if not supported (e.g. on LE only EM9301) 1906 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1907 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1908 return; 1909 1910 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1911 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1912 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1913 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1914 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1915 return; 1916 } 1917 // explicit fall through to reduce repetitions 1918 1919 #ifdef ENABLE_LE_CENTRAL 1920 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1921 #else 1922 hci_init_done(); 1923 #endif 1924 return; 1925 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1926 1927 #endif /* ENABLE_BLE */ 1928 1929 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1930 // skip write secure connections host support if not supported or disabled 1931 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1932 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1933 return; 1934 } 1935 break; 1936 1937 #ifdef ENABLE_SCO_OVER_HCI 1938 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1939 // skip write synchronous flow control if not supported 1940 if (hci_stack->local_supported_commands[0] & 0x04) break; 1941 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1946 // skip write default erroneous data reporting if not supported 1947 if (hci_stack->local_supported_commands[0] & 0x08) break; 1948 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1953 // skip bcm set sco pcm config on non-Broadcom chipsets 1954 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1955 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1956 1957 /* fall through */ 1958 1959 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1960 if (!hci_le_supported()){ 1961 // SKIP LE init for Classic only configuration 1962 hci_init_done(); 1963 return; 1964 } 1965 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1966 break; 1967 1968 #else /* !ENABLE_SCO_OVER_HCI */ 1969 1970 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1971 #ifdef ENABLE_SCO_OVER_PCM 1972 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1973 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1974 return; 1975 } 1976 #endif 1977 /* fall through */ 1978 1979 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1980 #ifdef ENABLE_BLE 1981 if (hci_le_supported()){ 1982 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1983 return; 1984 } 1985 #endif 1986 // SKIP LE init for Classic only configuration 1987 hci_init_done(); 1988 return; 1989 #endif /* ENABLE_SCO_OVER_HCI */ 1990 1991 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1992 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1993 // Response to command before init done state -> init done 1994 case (HCI_INIT_DONE-1): 1995 hci_init_done(); 1996 return; 1997 #endif 1998 1999 default: 2000 break; 2001 } 2002 hci_initializing_next_state(); 2003 } 2004 2005 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2006 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2007 bd_addr_t bd_address; 2008 (void)memcpy(&bd_address, conn->address, 6); 2009 2010 #ifdef ENABLE_CLASSIC 2011 // cache needed data 2012 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2013 #endif 2014 2015 // connection failed, remove entry 2016 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2017 btstack_memory_hci_connection_free( conn ); 2018 2019 #ifdef ENABLE_CLASSIC 2020 // notify client if dedicated bonding 2021 if (notify_dedicated_bonding_failed){ 2022 log_info("hci notify_dedicated_bonding_failed"); 2023 hci_emit_dedicated_bonding_result(bd_address, status); 2024 } 2025 2026 // if authentication error, also delete link key 2027 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2028 gap_drop_link_key_for_bd_addr(bd_address); 2029 } 2030 #else 2031 UNUSED(status); 2032 #endif 2033 } 2034 2035 #ifdef ENABLE_CLASSIC 2036 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2037 // SSP Controller 2038 if (features[6] & (1 << 3)){ 2039 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2040 } 2041 // eSCO 2042 if (features[3] & (1<<7)){ 2043 conn->remote_supported_features[0] |= 1; 2044 } 2045 // Extended features 2046 if (features[7] & (1<<7)){ 2047 conn->remote_supported_features[0] |= 2; 2048 } 2049 } 2050 2051 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2052 // SSP Host 2053 if (features[0] & (1 << 0)){ 2054 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2055 } 2056 // SC Host 2057 if (features[0] & (1 << 3)){ 2058 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2059 } 2060 } 2061 2062 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2063 // SC Controller 2064 if (features[1] & (1 << 0)){ 2065 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2066 } 2067 } 2068 2069 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2070 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2071 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2072 if (conn->bonding_flags & BONDING_DEDICATED){ 2073 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2074 } 2075 } 2076 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2077 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2078 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2079 } 2080 2081 #endif 2082 2083 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2084 // handle BT initialization 2085 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2086 hci_initializing_event_handler(packet, size); 2087 } 2088 2089 // help with BT sleep 2090 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2091 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2092 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2093 hci_initializing_next_state(); 2094 } 2095 } 2096 2097 #ifdef ENABLE_CLASSIC 2098 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2099 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2100 conn->encryption_key_size = encryption_key_size; 2101 2102 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2103 conn->requested_security_level = LEVEL_0; 2104 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2105 return; 2106 } 2107 2108 // Request Authentication if not already done 2109 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2110 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2111 } 2112 #endif 2113 2114 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2115 UNUSED(size); 2116 2117 uint16_t manufacturer; 2118 #ifdef ENABLE_CLASSIC 2119 hci_con_handle_t handle; 2120 hci_connection_t * conn; 2121 uint8_t status; 2122 #endif 2123 // get num cmd packets - limit to 1 to reduce complexity 2124 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2125 2126 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2127 switch (opcode){ 2128 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2129 if (packet[5]) break; 2130 // terminate, name 248 chars 2131 packet[6+248] = 0; 2132 log_info("local name: %s", &packet[6]); 2133 break; 2134 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2135 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2136 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2137 uint16_t acl_len = little_endian_read_16(packet, 6); 2138 uint16_t sco_len = packet[8]; 2139 2140 // determine usable ACL/SCO payload size 2141 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2142 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2143 2144 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2145 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2146 2147 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2148 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2149 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2150 } 2151 break; 2152 case HCI_OPCODE_HCI_READ_RSSI: 2153 if (packet[5] == ERROR_CODE_SUCCESS){ 2154 uint8_t event[5]; 2155 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2156 event[1] = 3; 2157 (void)memcpy(&event[2], &packet[6], 3); 2158 hci_emit_event(event, sizeof(event), 1); 2159 } 2160 break; 2161 #ifdef ENABLE_BLE 2162 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2163 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2164 hci_stack->le_acl_packets_total_num = packet[8]; 2165 // determine usable ACL payload size 2166 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2167 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2168 } 2169 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2170 break; 2171 #endif 2172 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2173 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2174 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2175 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2176 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2177 break; 2178 #endif 2179 #ifdef ENABLE_LE_CENTRAL 2180 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2181 hci_stack->le_whitelist_capacity = packet[6]; 2182 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2183 break; 2184 #endif 2185 case HCI_OPCODE_HCI_READ_BD_ADDR: 2186 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2187 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2188 #ifdef ENABLE_CLASSIC 2189 if (hci_stack->link_key_db){ 2190 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2191 } 2192 #endif 2193 break; 2194 #ifdef ENABLE_CLASSIC 2195 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2196 hci_emit_discoverable_enabled(hci_stack->discoverable); 2197 break; 2198 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2199 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2200 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2201 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2202 hci_emit_event(event, sizeof(event), 1); 2203 } 2204 break; 2205 #endif 2206 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2207 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2208 2209 #ifdef ENABLE_CLASSIC 2210 // determine usable ACL packet types based on host buffer size and supported features 2211 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2212 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2213 #endif 2214 // Classic/LE 2215 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2216 break; 2217 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2218 manufacturer = little_endian_read_16(packet, 10); 2219 // map Cypress to Broadcom 2220 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2221 log_info("Treat Cypress as Broadcom"); 2222 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2223 little_endian_store_16(packet, 10, manufacturer); 2224 } 2225 hci_stack->manufacturer = manufacturer; 2226 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2227 break; 2228 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2229 hci_stack->local_supported_commands[0] = 2230 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2231 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2232 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2233 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2234 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2238 hci_stack->local_supported_commands[1] = 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2244 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2245 break; 2246 #ifdef ENABLE_CLASSIC 2247 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2248 if (packet[5]) return; 2249 hci_stack->synchronous_flow_control_enabled = 1; 2250 break; 2251 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2252 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2253 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2254 conn = hci_connection_for_handle(handle); 2255 if (conn != NULL) { 2256 uint8_t key_size = 0; 2257 if (status == 0){ 2258 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2259 log_info("Handle %04x key Size: %u", handle, key_size); 2260 } else { 2261 key_size = 1; 2262 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2263 } 2264 hci_handle_read_encryption_key_size_complete(conn, key_size); 2265 } 2266 break; 2267 // assert pairing complete event is emitted. 2268 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2269 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2270 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2271 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2272 // lookup connection by gap pairing addr 2273 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2274 if (conn == NULL) break; 2275 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2276 break; 2277 2278 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2279 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2280 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2281 uint8_t event[67]; 2282 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2283 event[1] = 65; 2284 (void)memset(&event[2], 0, 65); 2285 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2286 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2287 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2288 event[2] = 3; 2289 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2290 } else { 2291 event[2] = 1; 2292 } 2293 } 2294 hci_emit_event(event, sizeof(event), 0); 2295 break; 2296 } 2297 2298 // note: only needed if user does not provide OOB data 2299 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2300 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2301 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2302 if (conn == NULL) break; 2303 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2304 break; 2305 #endif 2306 #endif 2307 default: 2308 break; 2309 } 2310 } 2311 2312 #ifdef ENABLE_BLE 2313 static void event_handle_le_connection_complete(const uint8_t * packet){ 2314 bd_addr_t addr; 2315 bd_addr_type_t addr_type; 2316 hci_connection_t * conn; 2317 2318 // Connection management 2319 reverse_bd_addr(&packet[8], addr); 2320 addr_type = (bd_addr_type_t)packet[7]; 2321 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2322 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2323 2324 #ifdef ENABLE_LE_CENTRAL 2325 // handle error: error is reported only to the initiator -> outgoing connection 2326 if (packet[3]){ 2327 2328 // handle cancelled outgoing connection 2329 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2330 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2331 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2332 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2333 // reset state 2334 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2335 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2336 // get outgoing connection conn struct for direct connect 2337 conn = gap_get_outgoing_connection(); 2338 } 2339 2340 // outgoing le connection establishment is done 2341 if (conn){ 2342 // remove entry 2343 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2344 btstack_memory_hci_connection_free( conn ); 2345 } 2346 return; 2347 } 2348 #endif 2349 2350 // on success, both hosts receive connection complete event 2351 if (packet[6] == HCI_ROLE_MASTER){ 2352 #ifdef ENABLE_LE_CENTRAL 2353 // if we're master on an le connection, it was an outgoing connection and we're done with it 2354 // note: no hci_connection_t object exists yet for connect with whitelist 2355 if (hci_is_le_connection_type(addr_type)){ 2356 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2357 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2358 } 2359 #endif 2360 } else { 2361 #ifdef ENABLE_LE_PERIPHERAL 2362 // if we're slave, it was an incoming connection, advertisements have stopped 2363 hci_stack->le_advertisements_active = false; 2364 #endif 2365 } 2366 2367 // LE connections are auto-accepted, so just create a connection if there isn't one already 2368 if (!conn){ 2369 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2370 } 2371 2372 // no memory, sorry. 2373 if (!conn){ 2374 return; 2375 } 2376 2377 conn->state = OPEN; 2378 conn->role = packet[6]; 2379 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2380 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2381 2382 #ifdef ENABLE_LE_PERIPHERAL 2383 if (packet[6] == HCI_ROLE_SLAVE){ 2384 hci_update_advertisements_enabled_for_current_roles(); 2385 } 2386 #endif 2387 2388 // init unenhanced att bearer mtu 2389 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2390 conn->att_connection.mtu_exchanged = false; 2391 2392 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2393 2394 // restart timer 2395 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2396 // btstack_run_loop_add_timer(&conn->timeout); 2397 2398 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2399 2400 hci_emit_nr_connections_changed(); 2401 } 2402 #endif 2403 2404 #ifdef ENABLE_CLASSIC 2405 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 2406 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2407 // LEVEL_4 is tested by l2cap 2408 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2409 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2410 if (level >= LEVEL_3){ 2411 // MITM not possible without keyboard or display 2412 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2413 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2414 2415 // MITM possible if one side has keyboard and the other has keyboard or display 2416 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2417 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2418 2419 // MITM not possible if one side has only display and other side has no keyboard 2420 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2421 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2422 } 2423 // LEVEL 2 requires SSP, which is a given 2424 return true; 2425 } 2426 2427 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2428 uint16_t i; 2429 for (i=0; i < size ; i++){ 2430 if (data[i] != 0) { 2431 return false; 2432 } 2433 } 2434 return true; 2435 } 2436 2437 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2438 // get requested security level 2439 gap_security_level_t requested_security_level = conn->requested_security_level; 2440 if (hci_stack->gap_secure_connections_only_mode){ 2441 requested_security_level = LEVEL_4; 2442 } 2443 2444 // assess security: LEVEL 4 requires SC 2445 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2446 if ((requested_security_level == LEVEL_4) && 2447 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2448 !hci_remote_sc_enabled(conn)){ 2449 log_info("Level 4 required, but SC not supported -> abort"); 2450 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2451 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2452 return; 2453 } 2454 2455 // assess security based on io capabilities 2456 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2457 // responder: fully validate io caps of both sides as well as OOB data 2458 bool security_possible = false; 2459 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2460 2461 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2462 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2463 // so we merge the OOB data availability 2464 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2465 if (conn->classic_oob_c_192 != NULL){ 2466 have_oob_data |= 1; 2467 } 2468 if (conn->classic_oob_c_256 != NULL){ 2469 have_oob_data |= 2; 2470 } 2471 // for up to Level 3, either P-192 as well as P-256 will do 2472 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2473 // if remote does not SC, we should not receive P-256 data either 2474 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2475 security_possible = true; 2476 } 2477 // for Level 4, P-256 is needed 2478 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2479 security_possible = true; 2480 } 2481 #endif 2482 2483 if (security_possible == false){ 2484 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2485 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2486 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2487 return; 2488 } 2489 } else { 2490 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2491 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2492 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2493 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2494 log_info("Level 3+ required, but no input/output -> abort"); 2495 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2496 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2497 return; 2498 } 2499 #endif 2500 #endif 2501 } 2502 2503 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2504 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2505 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2506 } else { 2507 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2508 } 2509 #endif 2510 } 2511 2512 #endif 2513 2514 static void event_handler(uint8_t *packet, uint16_t size){ 2515 2516 uint16_t event_length = packet[1]; 2517 2518 // assert packet is complete 2519 if (size != (event_length + 2u)){ 2520 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2521 return; 2522 } 2523 2524 bd_addr_type_t addr_type; 2525 hci_con_handle_t handle; 2526 hci_connection_t * conn; 2527 int i; 2528 int create_connection_cmd; 2529 2530 #ifdef ENABLE_CLASSIC 2531 hci_link_type_t link_type; 2532 bd_addr_t addr; 2533 #endif 2534 2535 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2536 2537 switch (hci_event_packet_get_type(packet)) { 2538 2539 case HCI_EVENT_COMMAND_COMPLETE: 2540 handle_command_complete_event(packet, size); 2541 break; 2542 2543 case HCI_EVENT_COMMAND_STATUS: 2544 // get num cmd packets - limit to 1 to reduce complexity 2545 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2546 2547 // check command status to detected failed outgoing connections 2548 create_connection_cmd = 0; 2549 #ifdef ENABLE_CLASSIC 2550 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2551 create_connection_cmd = 1; 2552 } 2553 #endif 2554 #ifdef ENABLE_LE_CENTRAL 2555 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2556 create_connection_cmd = 1; 2557 } 2558 #endif 2559 if (create_connection_cmd) { 2560 uint8_t status = hci_event_command_status_get_status(packet); 2561 addr_type = hci_stack->outgoing_addr_type; 2562 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2563 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2564 2565 // reset outgoing address info 2566 memset(hci_stack->outgoing_addr, 0, 6); 2567 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2568 2569 // on error 2570 if (status != ERROR_CODE_SUCCESS){ 2571 #ifdef ENABLE_LE_CENTRAL 2572 if (hci_is_le_connection_type(addr_type)){ 2573 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2574 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2575 } 2576 #endif 2577 // error => outgoing connection failed 2578 if (conn != NULL){ 2579 hci_handle_connection_failed(conn, status); 2580 } 2581 } 2582 } 2583 2584 #ifdef ENABLE_CLASSIC 2585 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2586 uint8_t status = hci_event_command_status_get_status(packet); 2587 log_info("command status (inquiry), status %x", status); 2588 if (status == ERROR_CODE_SUCCESS) { 2589 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2590 } else { 2591 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2592 } 2593 } 2594 #endif 2595 break; 2596 2597 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2598 if (size < 3) return; 2599 uint16_t num_handles = packet[2]; 2600 if (size != (3u + num_handles * 4u)) return; 2601 uint16_t offset = 3; 2602 for (i=0; i<num_handles;i++){ 2603 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2604 offset += 2u; 2605 uint16_t num_packets = little_endian_read_16(packet, offset); 2606 offset += 2u; 2607 2608 conn = hci_connection_for_handle(handle); 2609 if (!conn){ 2610 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2611 continue; 2612 } 2613 2614 if (conn->num_packets_sent >= num_packets){ 2615 conn->num_packets_sent -= num_packets; 2616 } else { 2617 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2618 conn->num_packets_sent = 0; 2619 } 2620 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2621 2622 #ifdef ENABLE_CLASSIC 2623 // For SCO, we do the can_send_now_check here 2624 hci_notify_if_sco_can_send_now(); 2625 #endif 2626 } 2627 break; 2628 } 2629 2630 #ifdef ENABLE_CLASSIC 2631 case HCI_EVENT_INQUIRY_COMPLETE: 2632 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2633 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2634 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2635 hci_emit_event(event, sizeof(event), 1); 2636 } 2637 break; 2638 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2639 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2640 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2641 } 2642 break; 2643 case HCI_EVENT_CONNECTION_REQUEST: 2644 reverse_bd_addr(&packet[2], addr); 2645 link_type = (hci_link_type_t) packet[11]; 2646 2647 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2648 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2649 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2650 bd_addr_copy(hci_stack->decline_addr, addr); 2651 break; 2652 } 2653 2654 if (hci_stack->gap_classic_accept_callback != NULL){ 2655 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2656 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2657 bd_addr_copy(hci_stack->decline_addr, addr); 2658 break; 2659 } 2660 } 2661 2662 // TODO: eval COD 8-10 2663 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2664 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2665 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2666 if (!conn) { 2667 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2668 } 2669 if (!conn) { 2670 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2671 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2672 bd_addr_copy(hci_stack->decline_addr, addr); 2673 break; 2674 } 2675 conn->role = HCI_ROLE_SLAVE; 2676 conn->state = RECEIVED_CONNECTION_REQUEST; 2677 // store info about eSCO 2678 if (link_type == HCI_LINK_TYPE_ESCO){ 2679 conn->remote_supported_features[0] |= 1; 2680 } 2681 hci_run(); 2682 break; 2683 2684 case HCI_EVENT_CONNECTION_COMPLETE: 2685 // Connection management 2686 reverse_bd_addr(&packet[5], addr); 2687 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2688 addr_type = BD_ADDR_TYPE_ACL; 2689 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2690 if (conn) { 2691 if (!packet[2]){ 2692 conn->state = OPEN; 2693 conn->con_handle = little_endian_read_16(packet, 3); 2694 2695 // queue get remote feature 2696 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2697 2698 // queue set supervision timeout if we're master 2699 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2700 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2701 } 2702 2703 // restart timer 2704 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2705 btstack_run_loop_add_timer(&conn->timeout); 2706 2707 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2708 2709 hci_emit_nr_connections_changed(); 2710 } else { 2711 // connection failed 2712 hci_handle_connection_failed(conn, packet[2]); 2713 } 2714 } 2715 break; 2716 2717 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2718 reverse_bd_addr(&packet[5], addr); 2719 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2720 if (packet[2]){ 2721 // connection failed 2722 break; 2723 } 2724 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2725 if (!conn) { 2726 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2727 } 2728 if (!conn) { 2729 break; 2730 } 2731 conn->state = OPEN; 2732 conn->con_handle = little_endian_read_16(packet, 3); 2733 2734 #ifdef ENABLE_SCO_OVER_HCI 2735 // update SCO 2736 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2737 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2738 } 2739 // trigger can send now 2740 if (hci_have_usb_transport()){ 2741 hci_stack->sco_can_send_now = true; 2742 } 2743 #endif 2744 #ifdef HAVE_SCO_TRANSPORT 2745 // configure sco transport 2746 if (hci_stack->sco_transport != NULL){ 2747 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2748 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2749 } 2750 #endif 2751 break; 2752 2753 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2754 handle = little_endian_read_16(packet, 3); 2755 conn = hci_connection_for_handle(handle); 2756 if (!conn) break; 2757 if (!packet[2]){ 2758 const uint8_t * features = &packet[5]; 2759 hci_handle_remote_features_page_0(conn, features); 2760 2761 // read extended features if possible 2762 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2763 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2764 break; 2765 } 2766 } 2767 hci_handle_remote_features_received(conn); 2768 break; 2769 2770 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2771 handle = little_endian_read_16(packet, 3); 2772 conn = hci_connection_for_handle(handle); 2773 if (!conn) break; 2774 // status = ok, page = 1 2775 if (!packet[2]) { 2776 uint8_t page_number = packet[5]; 2777 uint8_t maximum_page_number = packet[6]; 2778 const uint8_t * features = &packet[7]; 2779 bool done = false; 2780 switch (page_number){ 2781 case 1: 2782 hci_handle_remote_features_page_1(conn, features); 2783 if (maximum_page_number >= 2){ 2784 // get Secure Connections (Controller) from Page 2 if available 2785 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2786 } else { 2787 // otherwise, assume SC (Controller) == SC (Host) 2788 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2789 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2790 } 2791 done = true; 2792 } 2793 break; 2794 case 2: 2795 hci_handle_remote_features_page_2(conn, features); 2796 done = true; 2797 break; 2798 default: 2799 break; 2800 } 2801 if (!done) break; 2802 } 2803 hci_handle_remote_features_received(conn); 2804 break; 2805 2806 case HCI_EVENT_LINK_KEY_REQUEST: 2807 // request handled by hci_run() 2808 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2809 break; 2810 2811 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2812 hci_event_link_key_request_get_bd_addr(packet, addr); 2813 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2814 if (!conn) break; 2815 2816 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2817 2818 // CVE-2020-26555: ignore NULL link key 2819 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2820 if (btstack_is_null(&packet[8], 16)) break; 2821 2822 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2823 // Change Connection Encryption keeps link key type 2824 if (link_key_type != CHANGED_COMBINATION_KEY){ 2825 conn->link_key_type = link_key_type; 2826 } 2827 2828 // cache link key. link keys stored in little-endian format for legacy reasons 2829 memcpy(&conn->link_key, &packet[8], 16); 2830 2831 // only store link key: 2832 // - if bondable enabled 2833 if (hci_stack->bondable == false) break; 2834 // - if security level sufficient 2835 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2836 // - for SSP, also check if remote side requested bonding as well 2837 if (conn->link_key_type != COMBINATION_KEY){ 2838 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2839 if (!remote_bonding){ 2840 break; 2841 } 2842 } 2843 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2844 break; 2845 } 2846 2847 case HCI_EVENT_PIN_CODE_REQUEST: 2848 hci_event_pin_code_request_get_bd_addr(packet, addr); 2849 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2850 if (!conn) break; 2851 2852 hci_pairing_started(conn, false); 2853 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2854 if (!hci_stack->bondable ){ 2855 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2856 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2857 hci_run(); 2858 return; 2859 } 2860 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2861 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2862 log_info("Level 4 required, but SC not supported -> abort"); 2863 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2864 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2865 hci_run(); 2866 return; 2867 } 2868 break; 2869 2870 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2871 hci_event_io_capability_response_get_bd_addr(packet, addr); 2872 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2873 if (!conn) break; 2874 2875 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2876 hci_pairing_started(conn, true); 2877 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2878 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2879 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2880 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2881 #endif 2882 break; 2883 2884 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2885 hci_event_io_capability_response_get_bd_addr(packet, addr); 2886 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2887 if (!conn) break; 2888 2889 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2890 hci_connection_timestamp(conn); 2891 hci_pairing_started(conn, true); 2892 break; 2893 2894 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2895 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2896 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2897 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2898 if (!conn) break; 2899 2900 hci_connection_timestamp(conn); 2901 2902 hci_pairing_started(conn, true); 2903 2904 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2905 break; 2906 #endif 2907 2908 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2909 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2910 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2911 if (!conn) break; 2912 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2913 if (hci_stack->ssp_auto_accept){ 2914 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2915 }; 2916 } else { 2917 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2918 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2919 // don't forward event to app 2920 hci_run(); 2921 return; 2922 } 2923 break; 2924 2925 case HCI_EVENT_USER_PASSKEY_REQUEST: 2926 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2927 if (hci_stack->ssp_auto_accept){ 2928 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2929 }; 2930 break; 2931 2932 case HCI_EVENT_MODE_CHANGE: 2933 handle = hci_event_mode_change_get_handle(packet); 2934 conn = hci_connection_for_handle(handle); 2935 if (!conn) break; 2936 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2937 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2938 break; 2939 #endif 2940 2941 case HCI_EVENT_ENCRYPTION_CHANGE: 2942 handle = hci_event_encryption_change_get_connection_handle(packet); 2943 conn = hci_connection_for_handle(handle); 2944 if (!conn) break; 2945 if (hci_event_encryption_change_get_status(packet) == 0u) { 2946 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2947 if (encryption_enabled){ 2948 if (hci_is_le_connection(conn)){ 2949 // For LE, we accept connection as encrypted 2950 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2951 } 2952 #ifdef ENABLE_CLASSIC 2953 else { 2954 2955 // dedicated bonding: send result and disconnect 2956 if (conn->bonding_flags & BONDING_DEDICATED){ 2957 conn->bonding_flags &= ~BONDING_DEDICATED; 2958 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2959 conn->bonding_status = packet[2]; 2960 break; 2961 } 2962 2963 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2964 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2965 bool connected_uses_aes_ccm = encryption_enabled == 2; 2966 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2967 log_info("SC during pairing, but only E0 now -> abort"); 2968 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2969 break; 2970 } 2971 2972 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2973 if (connected_uses_aes_ccm){ 2974 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2975 } 2976 2977 #ifdef ENABLE_TESTING_SUPPORT 2978 // work around for issue with PTS dongle 2979 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2980 #endif 2981 2982 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2983 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2984 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2985 } else { 2986 // if not, pretend everything is perfect 2987 hci_handle_read_encryption_key_size_complete(conn, 16); 2988 } 2989 } 2990 #endif 2991 } else { 2992 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2993 } 2994 } 2995 2996 break; 2997 2998 #ifdef ENABLE_CLASSIC 2999 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3000 handle = hci_event_authentication_complete_get_connection_handle(packet); 3001 conn = hci_connection_for_handle(handle); 3002 if (!conn) break; 3003 3004 // clear authentication active flag 3005 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3006 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3007 3008 // authenticated only if auth status == 0 3009 if (hci_event_authentication_complete_get_status(packet) == 0){ 3010 // authenticated 3011 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3012 3013 // If not already encrypted, start encryption 3014 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3015 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3016 break; 3017 } 3018 } 3019 3020 // emit updated security level 3021 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3022 break; 3023 3024 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3025 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3026 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3027 if (!conn) break; 3028 3029 // treat successfully paired connection as authenticated 3030 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3031 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3032 } 3033 3034 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3035 break; 3036 #endif 3037 3038 // HCI_EVENT_DISCONNECTION_COMPLETE 3039 // has been split, to first notify stack before shutting connection down 3040 // see end of function, too. 3041 case HCI_EVENT_DISCONNECTION_COMPLETE: 3042 if (packet[2]) break; // status != 0 3043 handle = little_endian_read_16(packet, 3); 3044 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3045 if (hci_stack->acl_fragmentation_total_size > 0u) { 3046 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3047 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3048 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3049 hci_stack->acl_fragmentation_total_size = 0; 3050 hci_stack->acl_fragmentation_pos = 0; 3051 if (release_buffer){ 3052 hci_release_packet_buffer(); 3053 } 3054 } 3055 } 3056 3057 conn = hci_connection_for_handle(handle); 3058 if (!conn) break; 3059 #ifdef ENABLE_CLASSIC 3060 // pairing failed if it was ongoing 3061 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3062 #endif 3063 // mark connection for shutdown, stop timers 3064 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3065 hci_connection_stop_timer(conn); 3066 3067 // emit dedicatd bonding event 3068 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3069 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3070 } 3071 3072 #ifdef ENABLE_BLE 3073 #ifdef ENABLE_LE_PERIPHERAL 3074 // re-enable advertisements for le connections if active 3075 if (hci_is_le_connection(conn)){ 3076 hci_update_advertisements_enabled_for_current_roles(); 3077 } 3078 #endif 3079 #endif 3080 break; 3081 3082 case HCI_EVENT_HARDWARE_ERROR: 3083 log_error("Hardware Error: 0x%02x", packet[2]); 3084 if (hci_stack->hardware_error_callback){ 3085 (*hci_stack->hardware_error_callback)(packet[2]); 3086 } else { 3087 // if no special requests, just reboot stack 3088 hci_power_control_off(); 3089 hci_power_control_on(); 3090 } 3091 break; 3092 3093 #ifdef ENABLE_CLASSIC 3094 case HCI_EVENT_ROLE_CHANGE: 3095 if (packet[2]) break; // status != 0 3096 reverse_bd_addr(&packet[3], addr); 3097 addr_type = BD_ADDR_TYPE_ACL; 3098 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3099 if (!conn) break; 3100 conn->role = packet[9]; 3101 break; 3102 #endif 3103 3104 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3105 // release packet buffer only for asynchronous transport and if there are not further fragements 3106 if (hci_transport_synchronous()) { 3107 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3108 return; // instead of break: to avoid re-entering hci_run() 3109 } 3110 hci_stack->acl_fragmentation_tx_active = 0; 3111 if (hci_stack->acl_fragmentation_total_size) break; 3112 hci_release_packet_buffer(); 3113 3114 // L2CAP receives this event via the hci_emit_event below 3115 3116 #ifdef ENABLE_CLASSIC 3117 // For SCO, we do the can_send_now_check here 3118 hci_notify_if_sco_can_send_now(); 3119 #endif 3120 break; 3121 3122 #ifdef ENABLE_CLASSIC 3123 case HCI_EVENT_SCO_CAN_SEND_NOW: 3124 // For SCO, we do the can_send_now_check here 3125 hci_stack->sco_can_send_now = true; 3126 hci_notify_if_sco_can_send_now(); 3127 return; 3128 3129 // explode inquriy results for easier consumption 3130 case HCI_EVENT_INQUIRY_RESULT: 3131 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3132 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3133 gap_inquiry_explode(packet, size); 3134 break; 3135 #endif 3136 3137 #ifdef ENABLE_BLE 3138 case HCI_EVENT_LE_META: 3139 switch (packet[2]){ 3140 #ifdef ENABLE_LE_CENTRAL 3141 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3142 // log_info("advertising report received"); 3143 if (!hci_stack->le_scanning_enabled) break; 3144 le_handle_advertisement_report(packet, size); 3145 break; 3146 #endif 3147 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3148 event_handle_le_connection_complete(packet); 3149 break; 3150 3151 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3152 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3153 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3154 conn = hci_connection_for_handle(handle); 3155 if (!conn) break; 3156 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3157 break; 3158 3159 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3160 // connection 3161 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3162 conn = hci_connection_for_handle(handle); 3163 if (conn) { 3164 // read arguments 3165 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3166 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3167 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3168 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3169 3170 // validate against current connection parameter range 3171 le_connection_parameter_range_t existing_range; 3172 gap_get_connection_parameter_range(&existing_range); 3173 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3174 if (update_parameter){ 3175 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3176 conn->le_conn_interval_min = le_conn_interval_min; 3177 conn->le_conn_interval_max = le_conn_interval_max; 3178 conn->le_conn_latency = le_conn_latency; 3179 conn->le_supervision_timeout = le_supervision_timeout; 3180 } else { 3181 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3182 } 3183 } 3184 break; 3185 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3186 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3187 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3188 conn = hci_connection_for_handle(handle); 3189 if (conn) { 3190 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3191 } 3192 break; 3193 #endif 3194 default: 3195 break; 3196 } 3197 break; 3198 #endif 3199 case HCI_EVENT_VENDOR_SPECIFIC: 3200 // Vendor specific commands often create vendor specific event instead of num completed packets 3201 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3202 switch (hci_stack->manufacturer){ 3203 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3204 hci_stack->num_cmd_packets = 1; 3205 break; 3206 default: 3207 break; 3208 } 3209 break; 3210 default: 3211 break; 3212 } 3213 3214 handle_event_for_current_stack_state(packet, size); 3215 3216 // notify upper stack 3217 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3218 3219 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3220 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3221 handle = little_endian_read_16(packet, 3); 3222 hci_connection_t * aConn = hci_connection_for_handle(handle); 3223 // discard connection if app did not trigger a reconnect in the event handler 3224 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3225 hci_shutdown_connection(aConn); 3226 } 3227 } 3228 3229 // execute main loop 3230 hci_run(); 3231 } 3232 3233 #ifdef ENABLE_CLASSIC 3234 3235 #ifdef ENABLE_SCO_OVER_HCI 3236 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3237 static void sco_schedule_tx(hci_connection_t * conn); 3238 3239 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3240 log_debug("SCO TX Timeout"); 3241 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3242 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3243 if (!conn) return; 3244 3245 // trigger send 3246 conn->sco_tx_ready = 1; 3247 // extra packet if CVSD but SCO buffer is too short 3248 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3249 conn->sco_tx_ready++; 3250 } 3251 hci_notify_if_sco_can_send_now(); 3252 } 3253 3254 3255 #define SCO_TX_AFTER_RX_MS (6) 3256 3257 static void sco_schedule_tx(hci_connection_t * conn){ 3258 3259 uint32_t now = btstack_run_loop_get_time_ms(); 3260 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3261 int time_delta_ms = sco_tx_ms - now; 3262 3263 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3264 3265 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3266 btstack_run_loop_remove_timer(timer); 3267 btstack_run_loop_set_timer(timer, time_delta_ms); 3268 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3269 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3270 btstack_run_loop_add_timer(timer); 3271 } 3272 #endif 3273 3274 static void sco_handler(uint8_t * packet, uint16_t size){ 3275 // lookup connection struct 3276 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3277 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3278 if (!conn) return; 3279 3280 #ifdef ENABLE_SCO_OVER_HCI 3281 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3282 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3283 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3284 packet[2] = 0x3c; 3285 memmove(&packet[3], &packet[23], 63); 3286 size = 63; 3287 } 3288 } 3289 3290 if (hci_have_usb_transport()){ 3291 // Nothing to do 3292 } else { 3293 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 3294 if (hci_stack->synchronous_flow_control_enabled == 0){ 3295 uint32_t now = btstack_run_loop_get_time_ms(); 3296 3297 if (!conn->sco_rx_valid){ 3298 // ignore first 10 packets 3299 conn->sco_rx_count++; 3300 // log_debug("sco rx count %u", conn->sco_rx_count); 3301 if (conn->sco_rx_count == 10) { 3302 // use first timestamp as is and pretent it just started 3303 conn->sco_rx_ms = now; 3304 conn->sco_rx_valid = 1; 3305 conn->sco_rx_count = 0; 3306 sco_schedule_tx(conn); 3307 } 3308 } else { 3309 // track expected arrival timme 3310 conn->sco_rx_count++; 3311 conn->sco_rx_ms += 7; 3312 int delta = (int32_t) (now - conn->sco_rx_ms); 3313 if (delta > 0){ 3314 conn->sco_rx_ms++; 3315 } 3316 // log_debug("sco rx %u", conn->sco_rx_ms); 3317 sco_schedule_tx(conn); 3318 } 3319 } 3320 } 3321 #endif 3322 3323 // deliver to app 3324 if (hci_stack->sco_packet_handler) { 3325 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3326 } 3327 3328 #ifdef HAVE_SCO_TRANSPORT 3329 // We can send one packet for each received packet 3330 conn->sco_tx_ready++; 3331 hci_notify_if_sco_can_send_now(); 3332 #endif 3333 3334 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3335 conn->num_packets_completed++; 3336 hci_stack->host_completed_packets = 1; 3337 hci_run(); 3338 #endif 3339 } 3340 #endif 3341 3342 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3343 hci_dump_packet(packet_type, 1, packet, size); 3344 switch (packet_type) { 3345 case HCI_EVENT_PACKET: 3346 event_handler(packet, size); 3347 break; 3348 case HCI_ACL_DATA_PACKET: 3349 acl_handler(packet, size); 3350 break; 3351 #ifdef ENABLE_CLASSIC 3352 case HCI_SCO_DATA_PACKET: 3353 sco_handler(packet, size); 3354 break; 3355 #endif 3356 default: 3357 break; 3358 } 3359 } 3360 3361 /** 3362 * @brief Add event packet handler. 3363 */ 3364 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3365 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3366 } 3367 3368 3369 /** Register HCI packet handlers */ 3370 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3371 hci_stack->acl_packet_handler = handler; 3372 } 3373 3374 #ifdef ENABLE_CLASSIC 3375 /** 3376 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3377 */ 3378 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3379 hci_stack->sco_packet_handler = handler; 3380 } 3381 #endif 3382 3383 static void hci_state_reset(void){ 3384 // no connections yet 3385 hci_stack->connections = NULL; 3386 3387 // keep discoverable/connectable as this has been requested by the client(s) 3388 // hci_stack->discoverable = 0; 3389 // hci_stack->connectable = 0; 3390 // hci_stack->bondable = 1; 3391 // hci_stack->own_addr_type = 0; 3392 3393 // buffer is free 3394 hci_stack->hci_packet_buffer_reserved = false; 3395 3396 // no pending cmds 3397 hci_stack->decline_reason = 0; 3398 hci_stack->new_scan_enable_value = 0xff; 3399 3400 hci_stack->secure_connections_active = false; 3401 3402 #ifdef ENABLE_CLASSIC 3403 hci_stack->new_page_scan_interval = 0xffff; 3404 hci_stack->new_page_scan_window = 0xffff; 3405 hci_stack->new_page_scan_type = 0xff; 3406 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3407 hci_stack->gap_tasks = 3408 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3409 GAP_TASK_SET_CLASS_OF_DEVICE | 3410 GAP_TASK_SET_LOCAL_NAME | 3411 GAP_TASK_SET_EIR_DATA; 3412 #endif 3413 3414 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3415 hci_stack->classic_read_local_oob_data = true; 3416 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3417 #endif 3418 3419 // LE 3420 #ifdef ENABLE_BLE 3421 memset(hci_stack->le_random_address, 0, 6); 3422 hci_stack->le_random_address_set = 0; 3423 #endif 3424 #ifdef ENABLE_LE_CENTRAL 3425 hci_stack->le_scanning_active = false; 3426 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3427 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3428 hci_stack->le_whitelist_capacity = 0; 3429 #endif 3430 #ifdef ENABLE_LE_PERIPHERAL 3431 hci_stack->le_advertisements_active = false; 3432 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3433 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3434 } 3435 if (hci_stack->le_advertisements_data != NULL){ 3436 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3437 } 3438 #endif 3439 } 3440 3441 #ifdef ENABLE_CLASSIC 3442 /** 3443 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3444 */ 3445 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3446 // store and open remote device db 3447 hci_stack->link_key_db = link_key_db; 3448 if (hci_stack->link_key_db) { 3449 hci_stack->link_key_db->open(); 3450 } 3451 } 3452 #endif 3453 3454 void hci_init(const hci_transport_t *transport, const void *config){ 3455 3456 #ifdef HAVE_MALLOC 3457 if (!hci_stack) { 3458 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3459 } 3460 #else 3461 hci_stack = &hci_stack_static; 3462 #endif 3463 memset(hci_stack, 0, sizeof(hci_stack_t)); 3464 3465 // reference to use transport layer implementation 3466 hci_stack->hci_transport = transport; 3467 3468 // reference to used config 3469 hci_stack->config = config; 3470 3471 // setup pointer for outgoing packet buffer 3472 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3473 3474 // max acl payload size defined in config.h 3475 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3476 3477 // register packet handlers with transport 3478 transport->register_packet_handler(&packet_handler); 3479 3480 hci_stack->state = HCI_STATE_OFF; 3481 3482 // class of device 3483 hci_stack->class_of_device = 0x007a020c; // Smartphone 3484 3485 // bondable by default 3486 hci_stack->bondable = 1; 3487 3488 #ifdef ENABLE_CLASSIC 3489 // classic name 3490 hci_stack->local_name = default_classic_name; 3491 3492 // Master slave policy 3493 hci_stack->master_slave_policy = 1; 3494 3495 // Allow Role Switch 3496 hci_stack->allow_role_switch = 1; 3497 3498 // Default / minimum security level = 2 3499 hci_stack->gap_security_level = LEVEL_2; 3500 3501 // Default Security Mode 4 3502 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3503 3504 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3505 hci_stack->gap_required_encyrption_key_size = 7; 3506 3507 // Link Supervision Timeout 3508 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3509 3510 #endif 3511 3512 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3513 hci_stack->ssp_enable = 1; 3514 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3515 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3516 hci_stack->ssp_auto_accept = 1; 3517 3518 // Secure Connections: enable (requires support from Controller) 3519 hci_stack->secure_connections_enable = true; 3520 3521 // voice setting - signed 16 bit pcm data with CVSD over the air 3522 hci_stack->sco_voice_setting = 0x60; 3523 3524 #ifdef ENABLE_LE_CENTRAL 3525 // connection parameter to use for outgoing connections 3526 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3527 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3528 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3529 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3530 hci_stack->le_connection_latency = 4; // 4 3531 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3532 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3533 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3534 3535 // default LE Scanning 3536 hci_stack->le_scan_type = 0x1; // active 3537 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3538 hci_stack->le_scan_window = 0x30; // 30 ms 3539 #endif 3540 3541 #ifdef ENABLE_LE_PERIPHERAL 3542 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3543 #endif 3544 3545 // connection parameter range used to answer connection parameter update requests in l2cap 3546 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3547 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3548 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3549 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3550 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3551 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3552 3553 hci_state_reset(); 3554 } 3555 3556 void hci_deinit(void){ 3557 #ifdef HAVE_MALLOC 3558 if (hci_stack) { 3559 free(hci_stack); 3560 } 3561 #endif 3562 hci_stack = NULL; 3563 3564 #ifdef ENABLE_CLASSIC 3565 disable_l2cap_timeouts = 0; 3566 #endif 3567 } 3568 3569 /** 3570 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3571 */ 3572 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3573 hci_stack->chipset = chipset_driver; 3574 3575 // reset chipset driver - init is also called on power_up 3576 if (hci_stack->chipset && hci_stack->chipset->init){ 3577 hci_stack->chipset->init(hci_stack->config); 3578 } 3579 } 3580 3581 /** 3582 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3583 */ 3584 void hci_set_control(const btstack_control_t *hardware_control){ 3585 // references to used control implementation 3586 hci_stack->control = hardware_control; 3587 // init with transport config 3588 hardware_control->init(hci_stack->config); 3589 } 3590 3591 void hci_close(void){ 3592 3593 #ifdef ENABLE_CLASSIC 3594 // close remote device db 3595 if (hci_stack->link_key_db) { 3596 hci_stack->link_key_db->close(); 3597 } 3598 #endif 3599 3600 btstack_linked_list_iterator_t lit; 3601 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3602 while (btstack_linked_list_iterator_has_next(&lit)){ 3603 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3604 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3605 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3606 hci_shutdown_connection(connection); 3607 } 3608 3609 hci_power_control(HCI_POWER_OFF); 3610 3611 #ifdef HAVE_MALLOC 3612 free(hci_stack); 3613 #endif 3614 hci_stack = NULL; 3615 } 3616 3617 #ifdef HAVE_SCO_TRANSPORT 3618 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3619 hci_stack->sco_transport = sco_transport; 3620 sco_transport->register_packet_handler(&packet_handler); 3621 } 3622 #endif 3623 3624 #ifdef ENABLE_CLASSIC 3625 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3626 // validate ranage and set 3627 if (encryption_key_size < 7) return; 3628 if (encryption_key_size > 16) return; 3629 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3630 } 3631 3632 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3633 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3634 hci_stack->gap_security_mode = security_mode; 3635 return ERROR_CODE_SUCCESS; 3636 } else { 3637 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3638 } 3639 } 3640 3641 gap_security_mode_t gap_get_security_mode(void){ 3642 return hci_stack->gap_security_mode; 3643 } 3644 3645 void gap_set_security_level(gap_security_level_t security_level){ 3646 hci_stack->gap_security_level = security_level; 3647 } 3648 3649 gap_security_level_t gap_get_security_level(void){ 3650 if (hci_stack->gap_secure_connections_only_mode){ 3651 return LEVEL_4; 3652 } 3653 return hci_stack->gap_security_level; 3654 } 3655 3656 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3657 hci_stack->gap_minimal_service_security_level = security_level; 3658 } 3659 3660 void gap_set_secure_connections_only_mode(bool enable){ 3661 hci_stack->gap_secure_connections_only_mode = enable; 3662 } 3663 3664 bool gap_get_secure_connections_only_mode(void){ 3665 return hci_stack->gap_secure_connections_only_mode; 3666 } 3667 #endif 3668 3669 #ifdef ENABLE_CLASSIC 3670 void gap_set_class_of_device(uint32_t class_of_device){ 3671 hci_stack->class_of_device = class_of_device; 3672 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3673 hci_run(); 3674 } 3675 3676 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3677 hci_stack->default_link_policy_settings = default_link_policy_settings; 3678 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3679 hci_run(); 3680 } 3681 3682 void gap_set_allow_role_switch(bool allow_role_switch){ 3683 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3684 } 3685 3686 uint8_t hci_get_allow_role_switch(void){ 3687 return hci_stack->allow_role_switch; 3688 } 3689 3690 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3691 hci_stack->link_supervision_timeout = link_supervision_timeout; 3692 } 3693 3694 void hci_disable_l2cap_timeout_check(void){ 3695 disable_l2cap_timeouts = 1; 3696 } 3697 #endif 3698 3699 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3700 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3701 void hci_set_bd_addr(bd_addr_t addr){ 3702 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3703 hci_stack->custom_bd_addr_set = 1; 3704 } 3705 #endif 3706 3707 // State-Module-Driver overview 3708 // state module low-level 3709 // HCI_STATE_OFF off close 3710 // HCI_STATE_INITIALIZING, on open 3711 // HCI_STATE_WORKING, on open 3712 // HCI_STATE_HALTING, on open 3713 // HCI_STATE_SLEEPING, off/sleep close 3714 // HCI_STATE_FALLING_ASLEEP on open 3715 3716 static int hci_power_control_on(void){ 3717 3718 // power on 3719 int err = 0; 3720 if (hci_stack->control && hci_stack->control->on){ 3721 err = (*hci_stack->control->on)(); 3722 } 3723 if (err){ 3724 log_error( "POWER_ON failed"); 3725 hci_emit_hci_open_failed(); 3726 return err; 3727 } 3728 3729 // int chipset driver 3730 if (hci_stack->chipset && hci_stack->chipset->init){ 3731 hci_stack->chipset->init(hci_stack->config); 3732 } 3733 3734 // init transport 3735 if (hci_stack->hci_transport->init){ 3736 hci_stack->hci_transport->init(hci_stack->config); 3737 } 3738 3739 // open transport 3740 err = hci_stack->hci_transport->open(); 3741 if (err){ 3742 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3743 if (hci_stack->control && hci_stack->control->off){ 3744 (*hci_stack->control->off)(); 3745 } 3746 hci_emit_hci_open_failed(); 3747 return err; 3748 } 3749 return 0; 3750 } 3751 3752 static void hci_power_control_off(void){ 3753 3754 log_info("hci_power_control_off"); 3755 3756 // close low-level device 3757 hci_stack->hci_transport->close(); 3758 3759 log_info("hci_power_control_off - hci_transport closed"); 3760 3761 // power off 3762 if (hci_stack->control && hci_stack->control->off){ 3763 (*hci_stack->control->off)(); 3764 } 3765 3766 log_info("hci_power_control_off - control closed"); 3767 3768 hci_stack->state = HCI_STATE_OFF; 3769 } 3770 3771 static void hci_power_control_sleep(void){ 3772 3773 log_info("hci_power_control_sleep"); 3774 3775 #if 0 3776 // don't close serial port during sleep 3777 3778 // close low-level device 3779 hci_stack->hci_transport->close(hci_stack->config); 3780 #endif 3781 3782 // sleep mode 3783 if (hci_stack->control && hci_stack->control->sleep){ 3784 (*hci_stack->control->sleep)(); 3785 } 3786 3787 hci_stack->state = HCI_STATE_SLEEPING; 3788 } 3789 3790 static int hci_power_control_wake(void){ 3791 3792 log_info("hci_power_control_wake"); 3793 3794 // wake on 3795 if (hci_stack->control && hci_stack->control->wake){ 3796 (*hci_stack->control->wake)(); 3797 } 3798 3799 #if 0 3800 // open low-level device 3801 int err = hci_stack->hci_transport->open(hci_stack->config); 3802 if (err){ 3803 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3804 if (hci_stack->control && hci_stack->control->off){ 3805 (*hci_stack->control->off)(); 3806 } 3807 hci_emit_hci_open_failed(); 3808 return err; 3809 } 3810 #endif 3811 3812 return 0; 3813 } 3814 3815 static void hci_power_transition_to_initializing(void){ 3816 // set up state machine 3817 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3818 hci_stack->hci_packet_buffer_reserved = false; 3819 hci_stack->state = HCI_STATE_INITIALIZING; 3820 hci_stack->substate = HCI_INIT_SEND_RESET; 3821 } 3822 3823 // returns error 3824 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3825 int err; 3826 switch (power_mode){ 3827 case HCI_POWER_ON: 3828 err = hci_power_control_on(); 3829 if (err != 0) { 3830 log_error("hci_power_control_on() error %d", err); 3831 return err; 3832 } 3833 hci_power_transition_to_initializing(); 3834 break; 3835 case HCI_POWER_OFF: 3836 // do nothing 3837 break; 3838 case HCI_POWER_SLEEP: 3839 // do nothing (with SLEEP == OFF) 3840 break; 3841 default: 3842 btstack_assert(false); 3843 break; 3844 } 3845 return ERROR_CODE_SUCCESS; 3846 } 3847 3848 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3849 switch (power_mode){ 3850 case HCI_POWER_ON: 3851 // do nothing 3852 break; 3853 case HCI_POWER_OFF: 3854 // no connections yet, just turn it off 3855 hci_power_control_off(); 3856 break; 3857 case HCI_POWER_SLEEP: 3858 // no connections yet, just turn it off 3859 hci_power_control_sleep(); 3860 break; 3861 default: 3862 btstack_assert(false); 3863 break; 3864 } 3865 return ERROR_CODE_SUCCESS; 3866 } 3867 3868 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3869 switch (power_mode){ 3870 case HCI_POWER_ON: 3871 // do nothing 3872 break; 3873 case HCI_POWER_OFF: 3874 // see hci_run 3875 hci_stack->state = HCI_STATE_HALTING; 3876 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3877 break; 3878 case HCI_POWER_SLEEP: 3879 // see hci_run 3880 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3881 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3882 break; 3883 default: 3884 btstack_assert(false); 3885 break; 3886 } 3887 return ERROR_CODE_SUCCESS; 3888 } 3889 3890 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3891 switch (power_mode){ 3892 case HCI_POWER_ON: 3893 hci_power_transition_to_initializing(); 3894 break; 3895 case HCI_POWER_OFF: 3896 // do nothing 3897 break; 3898 case HCI_POWER_SLEEP: 3899 // see hci_run 3900 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3901 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3902 break; 3903 default: 3904 btstack_assert(false); 3905 break; 3906 } 3907 return ERROR_CODE_SUCCESS; 3908 } 3909 3910 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3911 switch (power_mode){ 3912 case HCI_POWER_ON: 3913 3914 #ifdef HAVE_PLATFORM_IPHONE_OS 3915 // nothing to do, if H4 supports power management 3916 if (btstack_control_iphone_power_management_enabled()){ 3917 hci_stack->state = HCI_STATE_INITIALIZING; 3918 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3919 break; 3920 } 3921 #endif 3922 hci_power_transition_to_initializing(); 3923 break; 3924 case HCI_POWER_OFF: 3925 // see hci_run 3926 hci_stack->state = HCI_STATE_HALTING; 3927 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3928 break; 3929 case HCI_POWER_SLEEP: 3930 // do nothing 3931 break; 3932 default: 3933 btstack_assert(false); 3934 break; 3935 } 3936 return ERROR_CODE_SUCCESS; 3937 } 3938 3939 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3940 int err; 3941 switch (power_mode){ 3942 case HCI_POWER_ON: 3943 #ifdef HAVE_PLATFORM_IPHONE_OS 3944 // nothing to do, if H4 supports power management 3945 if (btstack_control_iphone_power_management_enabled()){ 3946 hci_stack->state = HCI_STATE_INITIALIZING; 3947 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3948 hci_update_scan_enable(); 3949 break; 3950 } 3951 #endif 3952 err = hci_power_control_wake(); 3953 if (err) return err; 3954 hci_power_transition_to_initializing(); 3955 break; 3956 case HCI_POWER_OFF: 3957 hci_stack->state = HCI_STATE_HALTING; 3958 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3959 break; 3960 case HCI_POWER_SLEEP: 3961 // do nothing 3962 break; 3963 default: 3964 btstack_assert(false); 3965 break; 3966 } 3967 return ERROR_CODE_SUCCESS; 3968 } 3969 3970 int hci_power_control(HCI_POWER_MODE power_mode){ 3971 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3972 int err = 0; 3973 switch (hci_stack->state){ 3974 case HCI_STATE_OFF: 3975 err = hci_power_control_state_off(power_mode); 3976 break; 3977 case HCI_STATE_INITIALIZING: 3978 err = hci_power_control_state_initializing(power_mode); 3979 break; 3980 case HCI_STATE_WORKING: 3981 err = hci_power_control_state_working(power_mode); 3982 break; 3983 case HCI_STATE_HALTING: 3984 err = hci_power_control_state_halting(power_mode); 3985 break; 3986 case HCI_STATE_FALLING_ASLEEP: 3987 err = hci_power_control_state_falling_asleep(power_mode); 3988 break; 3989 case HCI_STATE_SLEEPING: 3990 err = hci_power_control_state_sleeping(power_mode); 3991 break; 3992 default: 3993 btstack_assert(false); 3994 break; 3995 } 3996 if (err != 0){ 3997 return err; 3998 } 3999 4000 // create internal event 4001 hci_emit_state(); 4002 4003 // trigger next/first action 4004 hci_run(); 4005 4006 return 0; 4007 } 4008 4009 4010 #ifdef ENABLE_CLASSIC 4011 4012 static void hci_update_scan_enable(void){ 4013 // 2 = page scan, 1 = inq scan 4014 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4015 hci_run(); 4016 } 4017 4018 void gap_discoverable_control(uint8_t enable){ 4019 if (enable) enable = 1; // normalize argument 4020 4021 if (hci_stack->discoverable == enable){ 4022 hci_emit_discoverable_enabled(hci_stack->discoverable); 4023 return; 4024 } 4025 4026 hci_stack->discoverable = enable; 4027 hci_update_scan_enable(); 4028 } 4029 4030 void gap_connectable_control(uint8_t enable){ 4031 if (enable) enable = 1; // normalize argument 4032 4033 // don't emit event 4034 if (hci_stack->connectable == enable) return; 4035 4036 hci_stack->connectable = enable; 4037 hci_update_scan_enable(); 4038 } 4039 #endif 4040 4041 void gap_local_bd_addr(bd_addr_t address_buffer){ 4042 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4043 } 4044 4045 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4046 static void hci_host_num_completed_packets(void){ 4047 4048 // create packet manually as arrays are not supported and num_commands should not get reduced 4049 hci_reserve_packet_buffer(); 4050 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4051 4052 uint16_t size = 0; 4053 uint16_t num_handles = 0; 4054 packet[size++] = 0x35; 4055 packet[size++] = 0x0c; 4056 size++; // skip param len 4057 size++; // skip num handles 4058 4059 // add { handle, packets } entries 4060 btstack_linked_item_t * it; 4061 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4062 hci_connection_t * connection = (hci_connection_t *) it; 4063 if (connection->num_packets_completed){ 4064 little_endian_store_16(packet, size, connection->con_handle); 4065 size += 2; 4066 little_endian_store_16(packet, size, connection->num_packets_completed); 4067 size += 2; 4068 // 4069 num_handles++; 4070 connection->num_packets_completed = 0; 4071 } 4072 } 4073 4074 packet[2] = size - 3; 4075 packet[3] = num_handles; 4076 4077 hci_stack->host_completed_packets = 0; 4078 4079 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4080 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4081 4082 // release packet buffer for synchronous transport implementations 4083 if (hci_transport_synchronous()){ 4084 hci_release_packet_buffer(); 4085 hci_emit_transport_packet_sent(); 4086 } 4087 } 4088 #endif 4089 4090 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4091 UNUSED(ds); 4092 hci_stack->substate = HCI_HALTING_CLOSE; 4093 // allow packet handlers to defer final shutdown 4094 hci_emit_state(); 4095 hci_run(); 4096 } 4097 4098 static bool hci_run_acl_fragments(void){ 4099 if (hci_stack->acl_fragmentation_total_size > 0u) { 4100 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4101 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4102 if (connection) { 4103 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4104 hci_send_acl_packet_fragments(connection); 4105 return true; 4106 } 4107 } else { 4108 // connection gone -> discard further fragments 4109 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4110 hci_stack->acl_fragmentation_total_size = 0; 4111 hci_stack->acl_fragmentation_pos = 0; 4112 } 4113 } 4114 return false; 4115 } 4116 4117 #ifdef ENABLE_CLASSIC 4118 static bool hci_run_general_gap_classic(void){ 4119 4120 // assert stack is working and classic is active 4121 if (hci_classic_supported() == false) return false; 4122 if (hci_stack->state != HCI_STATE_WORKING) return false; 4123 4124 // decline incoming connections 4125 if (hci_stack->decline_reason){ 4126 uint8_t reason = hci_stack->decline_reason; 4127 hci_stack->decline_reason = 0; 4128 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4129 return true; 4130 } 4131 4132 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4133 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4134 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4135 return true; 4136 } 4137 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4138 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4139 gap_run_set_local_name(); 4140 return true; 4141 } 4142 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4143 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4144 gap_run_set_eir_data(); 4145 return true; 4146 } 4147 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4148 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4149 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4150 return true; 4151 } 4152 // write page scan activity 4153 if (hci_stack->new_page_scan_interval != 0xffff) { 4154 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4155 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4156 hci_stack->new_page_scan_interval = 0xffff; 4157 hci_stack->new_page_scan_window = 0xffff; 4158 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4159 return true; 4160 } 4161 // write page scan type 4162 if (hci_stack->new_page_scan_type != 0xff) { 4163 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4164 hci_stack->new_page_scan_type = 0xff; 4165 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4166 return true; 4167 } 4168 // send scan enable 4169 if (hci_stack->new_scan_enable_value != 0xff) { 4170 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4171 hci_stack->new_scan_enable_value = 0xff; 4172 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4173 return true; 4174 } 4175 4176 // start/stop inquiry 4177 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4178 uint8_t duration = hci_stack->inquiry_state; 4179 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4180 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4181 return true; 4182 } 4183 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4184 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4185 hci_send_cmd(&hci_inquiry_cancel); 4186 return true; 4187 } 4188 // remote name request 4189 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4190 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4191 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4192 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4193 return true; 4194 } 4195 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4196 // Local OOB data 4197 if (hci_stack->classic_read_local_oob_data){ 4198 hci_stack->classic_read_local_oob_data = false; 4199 if (hci_stack->local_supported_commands[1] & 0x10u){ 4200 hci_send_cmd(&hci_read_local_extended_oob_data); 4201 } else { 4202 hci_send_cmd(&hci_read_local_oob_data); 4203 } 4204 } 4205 #endif 4206 // pairing 4207 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4208 uint8_t state = hci_stack->gap_pairing_state; 4209 uint8_t pin_code[16]; 4210 switch (state){ 4211 case GAP_PAIRING_STATE_SEND_PIN: 4212 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4213 memset(pin_code, 0, 16); 4214 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4215 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4216 break; 4217 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4218 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4219 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4220 break; 4221 case GAP_PAIRING_STATE_SEND_PASSKEY: 4222 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4223 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4224 break; 4225 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4226 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4227 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4228 break; 4229 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4230 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4231 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4232 break; 4233 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4234 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4235 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4236 break; 4237 default: 4238 break; 4239 } 4240 return true; 4241 } 4242 return false; 4243 } 4244 #endif 4245 4246 #ifdef ENABLE_BLE 4247 static bool hci_run_general_gap_le(void){ 4248 4249 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4250 4251 if (hci_stack->state != HCI_STATE_WORKING) return false; 4252 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4253 4254 4255 // Phase 1: collect what to stop 4256 4257 bool scanning_stop = false; 4258 bool connecting_stop = false; 4259 bool advertising_stop = false; 4260 4261 #ifndef ENABLE_LE_CENTRAL 4262 UNUSED(scanning_stop); 4263 UNUSED(connecting_stop); 4264 #endif 4265 #ifndef ENABLE_LE_PERIPHERAL 4266 UNUSED(advertising_stop); 4267 #endif 4268 4269 // check if whitelist needs modification 4270 bool whitelist_modification_pending = false; 4271 btstack_linked_list_iterator_t lit; 4272 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4273 while (btstack_linked_list_iterator_has_next(&lit)){ 4274 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4275 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4276 whitelist_modification_pending = true; 4277 break; 4278 } 4279 } 4280 // check if resolving list needs modification 4281 bool resolving_list_modification_pending = false; 4282 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4283 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4284 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4285 resolving_list_modification_pending = true; 4286 } 4287 #endif 4288 4289 #ifdef ENABLE_LE_CENTRAL 4290 // scanning control 4291 if (hci_stack->le_scanning_active) { 4292 // stop if: 4293 // - parameter change required 4294 // - it's disabled 4295 // - whitelist change required but used for scanning 4296 // - resolving list modified 4297 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4298 if ((hci_stack->le_scanning_param_update) || 4299 !hci_stack->le_scanning_enabled || 4300 scanning_uses_whitelist || 4301 resolving_list_modification_pending){ 4302 4303 scanning_stop = true; 4304 } 4305 } 4306 #endif 4307 4308 #ifdef ENABLE_LE_CENTRAL 4309 // connecting control 4310 bool connecting_with_whitelist; 4311 switch (hci_stack->le_connecting_state){ 4312 case LE_CONNECTING_DIRECT: 4313 case LE_CONNECTING_WHITELIST: 4314 // stop connecting if: 4315 // - connecting uses white and whitelist modification pending 4316 // - if it got disabled 4317 // - resolving list modified 4318 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4319 if ((connecting_with_whitelist && whitelist_modification_pending) || 4320 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4321 resolving_list_modification_pending) { 4322 4323 connecting_stop = true; 4324 } 4325 break; 4326 default: 4327 break; 4328 } 4329 #endif 4330 4331 #ifdef ENABLE_LE_PERIPHERAL 4332 // le advertisement control 4333 if (hci_stack->le_advertisements_active){ 4334 // stop if: 4335 // - parameter change required 4336 // - it's disabled 4337 // - whitelist change required but used for advertisement filter policy 4338 // - resolving list modified 4339 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4340 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4341 if (advertising_change || 4342 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4343 (advertising_uses_whitelist & whitelist_modification_pending) || 4344 resolving_list_modification_pending) { 4345 4346 advertising_stop = true; 4347 } 4348 } 4349 #endif 4350 4351 4352 // Phase 2: stop everything that should be off during modifications 4353 4354 #ifdef ENABLE_LE_CENTRAL 4355 if (scanning_stop){ 4356 hci_stack->le_scanning_active = false; 4357 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4358 return true; 4359 } 4360 #endif 4361 4362 #ifdef ENABLE_LE_CENTRAL 4363 if (connecting_stop){ 4364 hci_send_cmd(&hci_le_create_connection_cancel); 4365 return true; 4366 } 4367 #endif 4368 4369 #ifdef ENABLE_LE_PERIPHERAL 4370 if (advertising_stop){ 4371 hci_stack->le_advertisements_active = false; 4372 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4373 return true; 4374 } 4375 #endif 4376 4377 // Phase 3: modify 4378 4379 #ifdef ENABLE_LE_CENTRAL 4380 if (hci_stack->le_scanning_param_update){ 4381 hci_stack->le_scanning_param_update = false; 4382 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4383 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4384 return true; 4385 } 4386 #endif 4387 4388 #ifdef ENABLE_LE_PERIPHERAL 4389 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4390 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4391 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4392 hci_send_cmd(&hci_le_set_advertising_parameters, 4393 hci_stack->le_advertisements_interval_min, 4394 hci_stack->le_advertisements_interval_max, 4395 hci_stack->le_advertisements_type, 4396 hci_stack->le_advertisements_own_addr_type, 4397 hci_stack->le_advertisements_direct_address_type, 4398 hci_stack->le_advertisements_direct_address, 4399 hci_stack->le_advertisements_channel_map, 4400 hci_stack->le_advertisements_filter_policy); 4401 return true; 4402 } 4403 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4404 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4405 uint8_t adv_data_clean[31]; 4406 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4407 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4408 hci_stack->le_advertisements_data_len); 4409 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4410 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4411 return true; 4412 } 4413 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4414 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4415 uint8_t scan_data_clean[31]; 4416 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4417 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4418 hci_stack->le_scan_response_data_len); 4419 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4420 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4421 return true; 4422 } 4423 #endif 4424 4425 4426 #ifdef ENABLE_LE_CENTRAL 4427 // if connect with whitelist was active and is not cancelled yet, wait until next time 4428 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4429 #endif 4430 4431 // LE Whitelist Management 4432 if (whitelist_modification_pending){ 4433 // add/remove entries 4434 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4435 while (btstack_linked_list_iterator_has_next(&lit)){ 4436 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4437 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4438 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4439 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4440 return true; 4441 } 4442 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4443 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4444 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4445 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4446 return true; 4447 } 4448 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4449 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4450 btstack_memory_whitelist_entry_free(entry); 4451 } 4452 } 4453 } 4454 4455 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4456 // LE Resolving List Management 4457 if (resolving_list_supported) { 4458 uint16_t i; 4459 switch (hci_stack->le_resolving_list_state) { 4460 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4461 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4462 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4463 return true; 4464 case LE_RESOLVING_LIST_READ_SIZE: 4465 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4466 hci_send_cmd(&hci_le_read_resolving_list_size); 4467 return true; 4468 case LE_RESOLVING_LIST_SEND_CLEAR: 4469 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4470 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4471 sizeof(hci_stack->le_resolving_list_add_entries)); 4472 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4473 sizeof(hci_stack->le_resolving_list_remove_entries)); 4474 hci_send_cmd(&hci_le_clear_resolving_list); 4475 return true; 4476 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4477 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4478 uint8_t offset = i >> 3; 4479 uint8_t mask = 1 << (i & 7); 4480 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4481 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4482 bd_addr_t peer_identity_addreses; 4483 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4484 sm_key_t peer_irk; 4485 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4486 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4487 4488 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4489 // trigger whitelist entry 'update' (work around for controller bug) 4490 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4491 while (btstack_linked_list_iterator_has_next(&lit)) { 4492 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4493 if (entry->address_type != peer_identity_addr_type) continue; 4494 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4495 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4496 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4497 } 4498 #endif 4499 4500 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4501 peer_identity_addreses); 4502 return true; 4503 } 4504 4505 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4506 4507 /* fall through */ 4508 4509 case LE_RESOLVING_LIST_ADD_ENTRIES: 4510 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4511 uint8_t offset = i >> 3; 4512 uint8_t mask = 1 << (i & 7); 4513 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4514 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4515 bd_addr_t peer_identity_addreses; 4516 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4517 sm_key_t peer_irk; 4518 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4519 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4520 const uint8_t *local_irk = gap_get_persistent_irk(); 4521 // command uses format specifier 'P' that stores 16-byte value without flip 4522 uint8_t local_irk_flipped[16]; 4523 uint8_t peer_irk_flipped[16]; 4524 reverse_128(local_irk, local_irk_flipped); 4525 reverse_128(peer_irk, peer_irk_flipped); 4526 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4527 peer_irk_flipped, local_irk_flipped); 4528 return true; 4529 } 4530 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4531 break; 4532 4533 default: 4534 break; 4535 } 4536 } 4537 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4538 #endif 4539 4540 // Phase 4: restore state 4541 4542 #ifdef ENABLE_LE_CENTRAL 4543 // re-start scanning 4544 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4545 hci_stack->le_scanning_active = true; 4546 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4547 return true; 4548 } 4549 #endif 4550 4551 #ifdef ENABLE_LE_CENTRAL 4552 // re-start connecting 4553 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4554 bd_addr_t null_addr; 4555 memset(null_addr, 0, 6); 4556 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4557 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4558 hci_send_cmd(&hci_le_create_connection, 4559 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4560 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4561 1, // use whitelist 4562 0, // peer address type 4563 null_addr, // peer bd addr 4564 hci_stack->le_connection_own_addr_type, // our addr type: 4565 hci_stack->le_connection_interval_min, // conn interval min 4566 hci_stack->le_connection_interval_max, // conn interval max 4567 hci_stack->le_connection_latency, // conn latency 4568 hci_stack->le_supervision_timeout, // conn latency 4569 hci_stack->le_minimum_ce_length, // min ce length 4570 hci_stack->le_maximum_ce_length // max ce length 4571 ); 4572 return true; 4573 } 4574 #endif 4575 4576 #ifdef ENABLE_LE_PERIPHERAL 4577 // re-start advertising 4578 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4579 // check if advertisements should be enabled given 4580 hci_stack->le_advertisements_active = true; 4581 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4582 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4583 return true; 4584 } 4585 #endif 4586 4587 return false; 4588 } 4589 #endif 4590 4591 static bool hci_run_general_pending_commands(void){ 4592 btstack_linked_item_t * it; 4593 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4594 hci_connection_t * connection = (hci_connection_t *) it; 4595 4596 switch(connection->state){ 4597 case SEND_CREATE_CONNECTION: 4598 switch(connection->address_type){ 4599 #ifdef ENABLE_CLASSIC 4600 case BD_ADDR_TYPE_ACL: 4601 log_info("sending hci_create_connection"); 4602 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4603 break; 4604 #endif 4605 default: 4606 #ifdef ENABLE_BLE 4607 #ifdef ENABLE_LE_CENTRAL 4608 log_info("sending hci_le_create_connection"); 4609 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4610 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4611 hci_send_cmd(&hci_le_create_connection, 4612 hci_stack->le_connection_scan_interval, // conn scan interval 4613 hci_stack->le_connection_scan_window, // conn scan windows 4614 0, // don't use whitelist 4615 connection->address_type, // peer address type 4616 connection->address, // peer bd addr 4617 hci_stack->le_connection_own_addr_type, // our addr type: 4618 hci_stack->le_connection_interval_min, // conn interval min 4619 hci_stack->le_connection_interval_max, // conn interval max 4620 hci_stack->le_connection_latency, // conn latency 4621 hci_stack->le_supervision_timeout, // conn latency 4622 hci_stack->le_minimum_ce_length, // min ce length 4623 hci_stack->le_maximum_ce_length // max ce length 4624 ); 4625 connection->state = SENT_CREATE_CONNECTION; 4626 #endif 4627 #endif 4628 break; 4629 } 4630 return true; 4631 4632 #ifdef ENABLE_CLASSIC 4633 case RECEIVED_CONNECTION_REQUEST: 4634 connection->role = HCI_ROLE_SLAVE; 4635 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4636 log_info("sending hci_accept_connection_request"); 4637 connection->state = ACCEPTED_CONNECTION_REQUEST; 4638 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4639 } 4640 return true; 4641 #endif 4642 4643 #ifdef ENABLE_BLE 4644 #ifdef ENABLE_LE_CENTRAL 4645 case SEND_CANCEL_CONNECTION: 4646 connection->state = SENT_CANCEL_CONNECTION; 4647 hci_send_cmd(&hci_le_create_connection_cancel); 4648 return true; 4649 #endif 4650 #endif 4651 case SEND_DISCONNECT: 4652 connection->state = SENT_DISCONNECT; 4653 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4654 return true; 4655 4656 default: 4657 break; 4658 } 4659 4660 // no further commands if connection is about to get shut down 4661 if (connection->state == SENT_DISCONNECT) continue; 4662 4663 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4664 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4665 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4666 return true; 4667 } 4668 4669 #ifdef ENABLE_CLASSIC 4670 4671 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4672 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4673 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4674 return true; 4675 } 4676 4677 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4678 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4679 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4680 return true; 4681 } 4682 4683 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4684 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4685 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4686 return true; 4687 } 4688 4689 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4690 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4691 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4692 return true; 4693 } 4694 4695 // Handling link key request requires remote supported features 4696 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4697 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4698 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4699 4700 // lookup link key using cached key first 4701 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4702 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4703 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4704 } 4705 4706 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4707 if (have_link_key && security_level_sufficient){ 4708 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4709 } else { 4710 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4711 } 4712 return true; 4713 } 4714 4715 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4716 log_info("denying to pin request"); 4717 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4718 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4719 return true; 4720 } 4721 4722 // security assessment requires remote features 4723 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4724 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4725 hci_ssp_assess_security_on_io_cap_request(connection); 4726 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 4727 } 4728 4729 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4730 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4731 // set authentication requirements: 4732 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4733 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4734 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4735 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4736 authreq |= 1; 4737 } 4738 bool bonding = hci_stack->bondable; 4739 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4740 // if we have received IO Cap Response, we're in responder role 4741 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4742 if (bonding && !remote_bonding){ 4743 log_info("Remote not bonding, dropping local flag"); 4744 bonding = false; 4745 } 4746 } 4747 if (bonding){ 4748 if (connection->bonding_flags & BONDING_DEDICATED){ 4749 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4750 } else { 4751 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4752 } 4753 } 4754 uint8_t have_oob_data = 0; 4755 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4756 if (connection->classic_oob_c_192 != NULL){ 4757 have_oob_data |= 1; 4758 } 4759 if (connection->classic_oob_c_256 != NULL){ 4760 have_oob_data |= 2; 4761 } 4762 #endif 4763 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4764 return true; 4765 } 4766 4767 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4768 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4769 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4770 return true; 4771 } 4772 4773 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4774 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4775 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4776 const uint8_t zero[16] = { 0 }; 4777 const uint8_t * r_192 = zero; 4778 const uint8_t * c_192 = zero; 4779 const uint8_t * r_256 = zero; 4780 const uint8_t * c_256 = zero; 4781 // verify P-256 OOB 4782 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4783 c_256 = connection->classic_oob_c_256; 4784 if (connection->classic_oob_r_256 != NULL) { 4785 r_256 = connection->classic_oob_r_256; 4786 } 4787 } 4788 // verify P-192 OOB 4789 if ((connection->classic_oob_c_192 != NULL)) { 4790 c_192 = connection->classic_oob_c_192; 4791 if (connection->classic_oob_r_192 != NULL) { 4792 r_192 = connection->classic_oob_r_192; 4793 } 4794 } 4795 4796 // assess security 4797 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4798 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4799 if (need_level_4 && !can_reach_level_4){ 4800 log_info("Level 4 required, but not possible -> abort"); 4801 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4802 // send oob negative reply 4803 c_256 = NULL; 4804 c_192 = NULL; 4805 } 4806 4807 // Reply 4808 if (c_256 != zero) { 4809 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4810 } else if (c_192 != zero){ 4811 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4812 } else { 4813 hci_stack->classic_oob_con_handle = connection->con_handle; 4814 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4815 } 4816 return true; 4817 } 4818 #endif 4819 4820 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4821 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4822 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4823 return true; 4824 } 4825 4826 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4827 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4828 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4829 return true; 4830 } 4831 4832 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4833 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4834 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4835 return true; 4836 } 4837 4838 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4839 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4840 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4841 connection->state = SENT_DISCONNECT; 4842 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4843 return true; 4844 } 4845 4846 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4847 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4848 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4849 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4850 return true; 4851 } 4852 4853 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4854 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4855 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4856 return true; 4857 } 4858 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4859 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4860 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4861 return true; 4862 } 4863 #endif 4864 4865 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4866 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4867 #ifdef ENABLE_CLASSIC 4868 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4869 #endif 4870 if (connection->state != SENT_DISCONNECT){ 4871 connection->state = SENT_DISCONNECT; 4872 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4873 return true; 4874 } 4875 } 4876 4877 #ifdef ENABLE_CLASSIC 4878 uint16_t sniff_min_interval; 4879 switch (connection->sniff_min_interval){ 4880 case 0: 4881 break; 4882 case 0xffff: 4883 connection->sniff_min_interval = 0; 4884 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4885 return true; 4886 default: 4887 sniff_min_interval = connection->sniff_min_interval; 4888 connection->sniff_min_interval = 0; 4889 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4890 return true; 4891 } 4892 4893 if (connection->sniff_subrating_max_latency != 0xffff){ 4894 uint16_t max_latency = connection->sniff_subrating_max_latency; 4895 connection->sniff_subrating_max_latency = 0; 4896 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4897 return true; 4898 } 4899 4900 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4901 uint8_t service_type = (uint8_t) connection->qos_service_type; 4902 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4903 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 4904 return true; 4905 } 4906 4907 if (connection->request_role != HCI_ROLE_INVALID){ 4908 hci_role_t role = connection->request_role; 4909 connection->request_role = HCI_ROLE_INVALID; 4910 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4911 return true; 4912 } 4913 #endif 4914 4915 #ifdef ENABLE_BLE 4916 switch (connection->le_con_parameter_update_state){ 4917 // response to L2CAP CON PARAMETER UPDATE REQUEST 4918 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4919 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4920 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4921 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4922 0x0000, 0xffff); 4923 return true; 4924 case CON_PARAMETER_UPDATE_REPLY: 4925 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4926 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4927 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4928 0x0000, 0xffff); 4929 return true; 4930 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4931 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4932 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4933 return true; 4934 default: 4935 break; 4936 } 4937 if (connection->le_phy_update_all_phys != 0xffu){ 4938 uint8_t all_phys = connection->le_phy_update_all_phys; 4939 connection->le_phy_update_all_phys = 0xff; 4940 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 4941 return true; 4942 } 4943 #endif 4944 } 4945 return false; 4946 } 4947 4948 static void hci_run(void){ 4949 4950 bool done; 4951 4952 // send continuation fragments first, as they block the prepared packet buffer 4953 done = hci_run_acl_fragments(); 4954 if (done) return; 4955 4956 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4957 // send host num completed packets next as they don't require num_cmd_packets > 0 4958 if (!hci_can_send_comand_packet_transport()) return; 4959 if (hci_stack->host_completed_packets){ 4960 hci_host_num_completed_packets(); 4961 return; 4962 } 4963 #endif 4964 4965 if (!hci_can_send_command_packet_now()) return; 4966 4967 // global/non-connection oriented commands 4968 4969 4970 #ifdef ENABLE_CLASSIC 4971 // general gap classic 4972 done = hci_run_general_gap_classic(); 4973 if (done) return; 4974 #endif 4975 4976 #ifdef ENABLE_BLE 4977 // general gap le 4978 done = hci_run_general_gap_le(); 4979 if (done) return; 4980 #endif 4981 4982 // send pending HCI commands 4983 done = hci_run_general_pending_commands(); 4984 if (done) return; 4985 4986 // stack state sub statemachines 4987 hci_connection_t * connection; 4988 switch (hci_stack->state){ 4989 case HCI_STATE_INITIALIZING: 4990 hci_initializing_run(); 4991 break; 4992 4993 case HCI_STATE_HALTING: 4994 4995 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4996 switch (hci_stack->substate){ 4997 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4998 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4999 5000 #ifdef ENABLE_BLE 5001 #ifdef ENABLE_LE_CENTRAL 5002 // free whitelist entries 5003 { 5004 btstack_linked_list_iterator_t lit; 5005 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5006 while (btstack_linked_list_iterator_has_next(&lit)){ 5007 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5008 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5009 btstack_memory_whitelist_entry_free(entry); 5010 } 5011 } 5012 #endif 5013 #endif 5014 // close all open connections 5015 connection = (hci_connection_t *) hci_stack->connections; 5016 if (connection){ 5017 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5018 if (!hci_can_send_command_packet_now()) return; 5019 5020 // check state 5021 if (connection->state == SENT_DISCONNECT) return; 5022 connection->state = SENT_DISCONNECT; 5023 5024 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5025 5026 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5027 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5028 5029 // ... which would be ignored anyway as we shutdown (free) the connection now 5030 hci_shutdown_connection(connection); 5031 5032 // finally, send the disconnect command 5033 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5034 return; 5035 } 5036 5037 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5038 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5039 log_info("HCI_STATE_HALTING: wait 50 ms"); 5040 hci_stack->substate = HCI_HALTING_W4_TIMER; 5041 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5042 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5043 btstack_run_loop_add_timer(&hci_stack->timeout); 5044 break; 5045 } 5046 5047 /* fall through */ 5048 5049 case HCI_HALTING_CLOSE: 5050 log_info("HCI_STATE_HALTING, calling off"); 5051 5052 // switch mode 5053 hci_power_control_off(); 5054 5055 log_info("HCI_STATE_HALTING, emitting state"); 5056 hci_emit_state(); 5057 log_info("HCI_STATE_HALTING, done"); 5058 break; 5059 5060 case HCI_HALTING_W4_TIMER: 5061 // keep waiting 5062 5063 break; 5064 default: 5065 break; 5066 } 5067 5068 break; 5069 5070 case HCI_STATE_FALLING_ASLEEP: 5071 switch(hci_stack->substate) { 5072 case HCI_FALLING_ASLEEP_DISCONNECT: 5073 log_info("HCI_STATE_FALLING_ASLEEP"); 5074 // close all open connections 5075 connection = (hci_connection_t *) hci_stack->connections; 5076 5077 #ifdef HAVE_PLATFORM_IPHONE_OS 5078 // don't close connections, if H4 supports power management 5079 if (btstack_control_iphone_power_management_enabled()){ 5080 connection = NULL; 5081 } 5082 #endif 5083 if (connection){ 5084 5085 // send disconnect 5086 if (!hci_can_send_command_packet_now()) return; 5087 5088 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5089 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5090 5091 // send disconnected event right away - causes higher layer connections to get closed, too. 5092 hci_shutdown_connection(connection); 5093 return; 5094 } 5095 5096 if (hci_classic_supported()){ 5097 // disable page and inquiry scan 5098 if (!hci_can_send_command_packet_now()) return; 5099 5100 log_info("HCI_STATE_HALTING, disabling inq scans"); 5101 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5102 5103 // continue in next sub state 5104 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5105 break; 5106 } 5107 5108 /* fall through */ 5109 5110 case HCI_FALLING_ASLEEP_COMPLETE: 5111 log_info("HCI_STATE_HALTING, calling sleep"); 5112 #ifdef HAVE_PLATFORM_IPHONE_OS 5113 // don't actually go to sleep, if H4 supports power management 5114 if (btstack_control_iphone_power_management_enabled()){ 5115 // SLEEP MODE reached 5116 hci_stack->state = HCI_STATE_SLEEPING; 5117 hci_emit_state(); 5118 break; 5119 } 5120 #endif 5121 // switch mode 5122 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5123 hci_emit_state(); 5124 break; 5125 5126 default: 5127 break; 5128 } 5129 break; 5130 5131 default: 5132 break; 5133 } 5134 } 5135 5136 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5137 // house-keeping 5138 5139 #ifdef ENABLE_CLASSIC 5140 bd_addr_t addr; 5141 hci_connection_t * conn; 5142 #endif 5143 #ifdef ENABLE_LE_CENTRAL 5144 uint8_t initiator_filter_policy; 5145 #endif 5146 5147 uint16_t opcode = little_endian_read_16(packet, 0); 5148 switch (opcode) { 5149 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5150 hci_stack->loopback_mode = packet[3]; 5151 break; 5152 5153 #ifdef ENABLE_CLASSIC 5154 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5155 reverse_bd_addr(&packet[3], addr); 5156 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5157 5158 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5159 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5160 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5161 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5162 } 5163 5164 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5165 if (!conn) { 5166 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5167 if (!conn) { 5168 // notify client that alloc failed 5169 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5170 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5171 } 5172 conn->state = SEND_CREATE_CONNECTION; 5173 conn->role = HCI_ROLE_MASTER; 5174 } 5175 log_info("conn state %u", conn->state); 5176 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5177 switch (conn->state) { 5178 // if connection active exists 5179 case OPEN: 5180 // and OPEN, emit connection complete command 5181 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5182 // packet not sent to controller 5183 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5184 case RECEIVED_DISCONNECTION_COMPLETE: 5185 // create connection triggered in disconnect complete event, let's do it now 5186 break; 5187 case SEND_CREATE_CONNECTION: 5188 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5189 break; 5190 default: 5191 // otherwise, just ignore as it is already in the open process 5192 // packet not sent to controller 5193 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5194 } 5195 conn->state = SENT_CREATE_CONNECTION; 5196 5197 // track outgoing connection 5198 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5199 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5200 break; 5201 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5202 if (hci_stack->link_key_db) { 5203 reverse_bd_addr(&packet[3], addr); 5204 hci_stack->link_key_db->delete_link_key(addr); 5205 } 5206 break; 5207 5208 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5209 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5210 // setup_synchronous_connection? Voice setting at offset 22 5211 // TODO: compare to current setting if sco connection already active 5212 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5213 break; 5214 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5215 // accept_synchronus_connection? Voice setting at offset 18 5216 // TODO: compare to current setting if sco connection already active 5217 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5218 break; 5219 #endif 5220 #endif 5221 5222 #ifdef ENABLE_BLE 5223 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5224 hci_stack->le_random_address_set = 1; 5225 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5226 break; 5227 #ifdef ENABLE_LE_PERIPHERAL 5228 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5229 hci_stack->le_advertisements_active = packet[3] != 0; 5230 break; 5231 #endif 5232 #ifdef ENABLE_LE_CENTRAL 5233 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5234 // white list used? 5235 initiator_filter_policy = packet[7]; 5236 switch (initiator_filter_policy) { 5237 case 0: 5238 // whitelist not used 5239 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5240 break; 5241 case 1: 5242 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5243 break; 5244 default: 5245 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5246 break; 5247 } 5248 // track outgoing connection 5249 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5250 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5251 break; 5252 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5253 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5254 break; 5255 #endif 5256 #endif 5257 default: 5258 break; 5259 } 5260 5261 hci_stack->num_cmd_packets--; 5262 5263 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5264 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5265 if (err != 0){ 5266 return ERROR_CODE_HARDWARE_FAILURE; 5267 } 5268 return ERROR_CODE_SUCCESS; 5269 } 5270 5271 // disconnect because of security block 5272 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5273 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5274 if (!connection) return; 5275 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5276 } 5277 5278 5279 // Configure Secure Simple Pairing 5280 5281 #ifdef ENABLE_CLASSIC 5282 5283 // enable will enable SSP during init 5284 void gap_ssp_set_enable(int enable){ 5285 hci_stack->ssp_enable = enable; 5286 } 5287 5288 static int hci_local_ssp_activated(void){ 5289 return gap_ssp_supported() && hci_stack->ssp_enable; 5290 } 5291 5292 // if set, BTstack will respond to io capability request using authentication requirement 5293 void gap_ssp_set_io_capability(int io_capability){ 5294 hci_stack->ssp_io_capability = io_capability; 5295 } 5296 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5297 hci_stack->ssp_authentication_requirement = authentication_requirement; 5298 } 5299 5300 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5301 void gap_ssp_set_auto_accept(int auto_accept){ 5302 hci_stack->ssp_auto_accept = auto_accept; 5303 } 5304 5305 void gap_secure_connections_enable(bool enable){ 5306 hci_stack->secure_connections_enable = enable; 5307 } 5308 5309 #endif 5310 5311 // va_list part of hci_send_cmd 5312 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5313 if (!hci_can_send_command_packet_now()){ 5314 log_error("hci_send_cmd called but cannot send packet now"); 5315 return ERROR_CODE_COMMAND_DISALLOWED; 5316 } 5317 5318 // for HCI INITIALIZATION 5319 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5320 hci_stack->last_cmd_opcode = cmd->opcode; 5321 5322 hci_reserve_packet_buffer(); 5323 uint8_t * packet = hci_stack->hci_packet_buffer; 5324 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5325 uint8_t status = hci_send_cmd_packet(packet, size); 5326 5327 // release packet buffer on error or for synchronous transport implementations 5328 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5329 hci_release_packet_buffer(); 5330 hci_emit_transport_packet_sent(); 5331 } 5332 5333 return status; 5334 } 5335 5336 /** 5337 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5338 */ 5339 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5340 va_list argptr; 5341 va_start(argptr, cmd); 5342 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5343 va_end(argptr); 5344 return status; 5345 } 5346 5347 // Create various non-HCI events. 5348 // TODO: generalize, use table similar to hci_create_command 5349 5350 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5351 // dump packet 5352 if (dump) { 5353 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5354 } 5355 5356 // dispatch to all event handlers 5357 btstack_linked_list_iterator_t it; 5358 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5359 while (btstack_linked_list_iterator_has_next(&it)){ 5360 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5361 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5362 } 5363 } 5364 5365 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5366 if (!hci_stack->acl_packet_handler) return; 5367 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5368 } 5369 5370 #ifdef ENABLE_CLASSIC 5371 static void hci_notify_if_sco_can_send_now(void){ 5372 // notify SCO sender if waiting 5373 if (!hci_stack->sco_waiting_for_can_send_now) return; 5374 if (hci_can_send_sco_packet_now()){ 5375 hci_stack->sco_waiting_for_can_send_now = 0; 5376 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5377 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5378 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5379 } 5380 } 5381 5382 // parsing end emitting has been merged to reduce code size 5383 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5384 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5385 5386 uint8_t * eir_data; 5387 ad_context_t context; 5388 const uint8_t * name; 5389 uint8_t name_len; 5390 5391 if (size < 3) return; 5392 5393 int event_type = hci_event_packet_get_type(packet); 5394 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5395 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5396 5397 switch (event_type){ 5398 case HCI_EVENT_INQUIRY_RESULT: 5399 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5400 if (size != (3 + (num_responses * 14))) return; 5401 break; 5402 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5403 if (size != 257) return; 5404 if (num_responses != 1) return; 5405 break; 5406 default: 5407 return; 5408 } 5409 5410 // event[1] is set at the end 5411 int i; 5412 for (i=0; i<num_responses;i++){ 5413 memset(event, 0, sizeof(event)); 5414 event[0] = GAP_EVENT_INQUIRY_RESULT; 5415 uint8_t event_size = 27; // if name is not set by EIR 5416 5417 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5418 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5419 (void)memcpy(&event[9], 5420 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5421 3); // class of device 5422 (void)memcpy(&event[12], 5423 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5424 2); // clock offset 5425 5426 switch (event_type){ 5427 case HCI_EVENT_INQUIRY_RESULT: 5428 // 14,15,16,17 = 0, size 18 5429 break; 5430 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5431 event[14] = 1; 5432 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5433 // 16,17 = 0, size 18 5434 break; 5435 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5436 event[14] = 1; 5437 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5438 // EIR packets only contain a single inquiry response 5439 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5440 name = NULL; 5441 // Iterate over EIR data 5442 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5443 uint8_t data_type = ad_iterator_get_data_type(&context); 5444 uint8_t data_size = ad_iterator_get_data_len(&context); 5445 const uint8_t * data = ad_iterator_get_data(&context); 5446 // Prefer Complete Local Name over Shortened Local Name 5447 switch (data_type){ 5448 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5449 if (name) continue; 5450 /* fall through */ 5451 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5452 name = data; 5453 name_len = data_size; 5454 break; 5455 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5456 if (data_size != 8) break; 5457 event[16] = 1; 5458 memcpy(&event[17], data, 8); 5459 break; 5460 default: 5461 break; 5462 } 5463 } 5464 if (name){ 5465 event[25] = 1; 5466 // truncate name if needed 5467 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5468 event[26] = len; 5469 (void)memcpy(&event[27], name, len); 5470 event_size += len; 5471 } 5472 break; 5473 default: 5474 return; 5475 } 5476 event[1] = event_size - 2; 5477 hci_emit_event(event, event_size, 1); 5478 } 5479 } 5480 #endif 5481 5482 void hci_emit_state(void){ 5483 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5484 uint8_t event[3]; 5485 event[0] = BTSTACK_EVENT_STATE; 5486 event[1] = sizeof(event) - 2u; 5487 event[2] = hci_stack->state; 5488 hci_emit_event(event, sizeof(event), 1); 5489 } 5490 5491 #ifdef ENABLE_CLASSIC 5492 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5493 uint8_t event[13]; 5494 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5495 event[1] = sizeof(event) - 2; 5496 event[2] = status; 5497 little_endian_store_16(event, 3, con_handle); 5498 reverse_bd_addr(address, &event[5]); 5499 event[11] = 1; // ACL connection 5500 event[12] = 0; // encryption disabled 5501 hci_emit_event(event, sizeof(event), 1); 5502 } 5503 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5504 if (disable_l2cap_timeouts) return; 5505 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5506 uint8_t event[4]; 5507 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5508 event[1] = sizeof(event) - 2; 5509 little_endian_store_16(event, 2, conn->con_handle); 5510 hci_emit_event(event, sizeof(event), 1); 5511 } 5512 #endif 5513 5514 #ifdef ENABLE_BLE 5515 #ifdef ENABLE_LE_CENTRAL 5516 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5517 uint8_t event[21]; 5518 event[0] = HCI_EVENT_LE_META; 5519 event[1] = sizeof(event) - 2u; 5520 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5521 event[3] = status; 5522 little_endian_store_16(event, 4, con_handle); 5523 event[6] = 0; // TODO: role 5524 event[7] = address_type; 5525 reverse_bd_addr(address, &event[8]); 5526 little_endian_store_16(event, 14, 0); // interval 5527 little_endian_store_16(event, 16, 0); // latency 5528 little_endian_store_16(event, 18, 0); // supervision timeout 5529 event[20] = 0; // master clock accuracy 5530 hci_emit_event(event, sizeof(event), 1); 5531 } 5532 #endif 5533 #endif 5534 5535 static void hci_emit_transport_packet_sent(void){ 5536 // notify upper stack that it might be possible to send again 5537 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5538 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5539 } 5540 5541 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5542 uint8_t event[6]; 5543 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5544 event[1] = sizeof(event) - 2u; 5545 event[2] = 0; // status = OK 5546 little_endian_store_16(event, 3, con_handle); 5547 event[5] = reason; 5548 hci_emit_event(event, sizeof(event), 1); 5549 } 5550 5551 static void hci_emit_nr_connections_changed(void){ 5552 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5553 uint8_t event[3]; 5554 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5555 event[1] = sizeof(event) - 2u; 5556 event[2] = nr_hci_connections(); 5557 hci_emit_event(event, sizeof(event), 1); 5558 } 5559 5560 static void hci_emit_hci_open_failed(void){ 5561 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5562 uint8_t event[2]; 5563 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5564 event[1] = sizeof(event) - 2u; 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 5568 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5569 log_info("hci_emit_dedicated_bonding_result %u ", status); 5570 uint8_t event[9]; 5571 int pos = 0; 5572 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5573 event[pos++] = sizeof(event) - 2u; 5574 event[pos++] = status; 5575 reverse_bd_addr(address, &event[pos]); 5576 hci_emit_event(event, sizeof(event), 1); 5577 } 5578 5579 5580 #ifdef ENABLE_CLASSIC 5581 5582 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5583 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5584 uint8_t event[5]; 5585 int pos = 0; 5586 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5587 event[pos++] = sizeof(event) - 2; 5588 little_endian_store_16(event, 2, con_handle); 5589 pos += 2; 5590 event[pos++] = level; 5591 hci_emit_event(event, sizeof(event), 1); 5592 } 5593 5594 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5595 if (!connection) return LEVEL_0; 5596 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5597 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5598 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5599 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5600 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5601 // LEVEL 4 always requires 128 bit encrytion key size 5602 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5603 security_level = LEVEL_3; 5604 } 5605 return security_level; 5606 } 5607 5608 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5609 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5610 uint8_t event[3]; 5611 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5612 event[1] = sizeof(event) - 2; 5613 event[2] = enabled; 5614 hci_emit_event(event, sizeof(event), 1); 5615 } 5616 5617 // query if remote side supports eSCO 5618 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5619 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5620 if (!connection) return false; 5621 return (connection->remote_supported_features[0] & 1) != 0; 5622 } 5623 5624 static bool hci_ssp_supported(hci_connection_t * connection){ 5625 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5626 return (connection->bonding_flags & mask) == mask; 5627 } 5628 5629 // query if remote side supports SSP 5630 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5631 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5632 if (!connection) return false; 5633 return hci_ssp_supported(connection) ? 1 : 0; 5634 } 5635 5636 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5637 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5638 } 5639 5640 // GAP API 5641 /** 5642 * @bbrief enable/disable bonding. default is enabled 5643 * @praram enabled 5644 */ 5645 void gap_set_bondable_mode(int enable){ 5646 hci_stack->bondable = enable ? 1 : 0; 5647 } 5648 /** 5649 * @brief Get bondable mode. 5650 * @return 1 if bondable 5651 */ 5652 int gap_get_bondable_mode(void){ 5653 return hci_stack->bondable; 5654 } 5655 5656 /** 5657 * @brief map link keys to security levels 5658 */ 5659 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5660 switch (link_key_type){ 5661 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5662 return LEVEL_4; 5663 case COMBINATION_KEY: 5664 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5665 return LEVEL_3; 5666 default: 5667 return LEVEL_2; 5668 } 5669 } 5670 5671 /** 5672 * @brief map link keys to secure connection yes/no 5673 */ 5674 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5675 switch (link_key_type){ 5676 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5677 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5678 return 1; 5679 default: 5680 return 0; 5681 } 5682 } 5683 5684 /** 5685 * @brief map link keys to authenticated 5686 */ 5687 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5688 switch (link_key_type){ 5689 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5690 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5691 return 1; 5692 default: 5693 return 0; 5694 } 5695 } 5696 5697 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5698 log_info("gap_mitm_protection_required_for_security_level %u", level); 5699 return level > LEVEL_2; 5700 } 5701 5702 /** 5703 * @brief get current security level 5704 */ 5705 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5706 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5707 if (!connection) return LEVEL_0; 5708 return gap_security_level_for_connection(connection); 5709 } 5710 5711 /** 5712 * @brief request connection to device to 5713 * @result GAP_AUTHENTICATION_RESULT 5714 */ 5715 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5716 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5717 if (!connection){ 5718 hci_emit_security_level(con_handle, LEVEL_0); 5719 return; 5720 } 5721 5722 btstack_assert(hci_is_le_connection(connection) == false); 5723 5724 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 5725 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5726 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5727 requested_level = LEVEL_4; 5728 } 5729 5730 gap_security_level_t current_level = gap_security_level(con_handle); 5731 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5732 requested_level, connection->requested_security_level, current_level); 5733 5734 // authentication active if authentication request was sent or planned level > 0 5735 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5736 if (authentication_active){ 5737 // authentication already active 5738 if (connection->requested_security_level < requested_level){ 5739 // increase requested level as new level is higher 5740 // TODO: handle re-authentication when done 5741 connection->requested_security_level = requested_level; 5742 } 5743 } else { 5744 // no request active, notify if security sufficient 5745 if (requested_level <= current_level){ 5746 hci_emit_security_level(con_handle, current_level); 5747 return; 5748 } 5749 5750 // store request 5751 connection->requested_security_level = requested_level; 5752 5753 // start to authenticate connection 5754 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5755 hci_run(); 5756 } 5757 } 5758 5759 /** 5760 * @brief start dedicated bonding with device. disconnect after bonding 5761 * @param device 5762 * @param request MITM protection 5763 * @result GAP_DEDICATED_BONDING_COMPLETE 5764 */ 5765 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5766 5767 // create connection state machine 5768 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5769 5770 if (!connection){ 5771 return BTSTACK_MEMORY_ALLOC_FAILED; 5772 } 5773 5774 // delete linkn key 5775 gap_drop_link_key_for_bd_addr(device); 5776 5777 // configure LEVEL_2/3, dedicated bonding 5778 connection->state = SEND_CREATE_CONNECTION; 5779 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5780 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5781 connection->bonding_flags = BONDING_DEDICATED; 5782 5783 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5784 5785 // handle: connnection failure (connection complete != ok) 5786 // handle: authentication failure 5787 // handle: disconnect on done 5788 5789 hci_run(); 5790 5791 return 0; 5792 } 5793 5794 void gap_set_local_name(const char * local_name){ 5795 hci_stack->local_name = local_name; 5796 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5797 // also update EIR if not set by user 5798 if (hci_stack->eir_data == NULL){ 5799 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5800 } 5801 hci_run(); 5802 } 5803 #endif 5804 5805 5806 #ifdef ENABLE_BLE 5807 5808 #ifdef ENABLE_LE_CENTRAL 5809 void gap_start_scan(void){ 5810 hci_stack->le_scanning_enabled = true; 5811 hci_run(); 5812 } 5813 5814 void gap_stop_scan(void){ 5815 hci_stack->le_scanning_enabled = false; 5816 hci_run(); 5817 } 5818 5819 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5820 hci_stack->le_scan_type = scan_type; 5821 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5822 hci_stack->le_scan_interval = scan_interval; 5823 hci_stack->le_scan_window = scan_window; 5824 hci_stack->le_scanning_param_update = true; 5825 hci_run(); 5826 } 5827 5828 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5829 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5830 } 5831 5832 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5833 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5834 if (!conn){ 5835 // disallow if le connection is already outgoing 5836 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5837 log_error("le connection already active"); 5838 return ERROR_CODE_COMMAND_DISALLOWED; 5839 } 5840 5841 log_info("gap_connect: no connection exists yet, creating context"); 5842 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5843 if (!conn){ 5844 // notify client that alloc failed 5845 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5846 log_info("gap_connect: failed to alloc hci_connection_t"); 5847 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5848 } 5849 5850 // set le connecting state 5851 if (hci_is_le_connection_type(addr_type)){ 5852 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5853 } 5854 5855 conn->state = SEND_CREATE_CONNECTION; 5856 log_info("gap_connect: send create connection next"); 5857 hci_run(); 5858 return ERROR_CODE_SUCCESS; 5859 } 5860 5861 if (!hci_is_le_connection(conn) || 5862 (conn->state == SEND_CREATE_CONNECTION) || 5863 (conn->state == SENT_CREATE_CONNECTION)) { 5864 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5865 log_error("gap_connect: classic connection or connect is already being created"); 5866 return GATT_CLIENT_IN_WRONG_STATE; 5867 } 5868 5869 // check if connection was just disconnected 5870 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5871 log_info("gap_connect: send create connection (again)"); 5872 conn->state = SEND_CREATE_CONNECTION; 5873 hci_run(); 5874 return ERROR_CODE_SUCCESS; 5875 } 5876 5877 log_info("gap_connect: context exists with state %u", conn->state); 5878 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5879 hci_run(); 5880 return ERROR_CODE_SUCCESS; 5881 } 5882 5883 // @assumption: only a single outgoing LE Connection exists 5884 static hci_connection_t * gap_get_outgoing_connection(void){ 5885 btstack_linked_item_t *it; 5886 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5887 hci_connection_t * conn = (hci_connection_t *) it; 5888 if (!hci_is_le_connection(conn)) continue; 5889 switch (conn->state){ 5890 case SEND_CREATE_CONNECTION: 5891 case SENT_CREATE_CONNECTION: 5892 case SENT_CANCEL_CONNECTION: 5893 return conn; 5894 default: 5895 break; 5896 }; 5897 } 5898 return NULL; 5899 } 5900 5901 uint8_t gap_connect_cancel(void){ 5902 hci_connection_t * conn = gap_get_outgoing_connection(); 5903 if (!conn) return 0; 5904 switch (conn->state){ 5905 case SEND_CREATE_CONNECTION: 5906 // skip sending create connection and emit event instead 5907 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5908 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5909 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5910 btstack_memory_hci_connection_free( conn ); 5911 break; 5912 case SENT_CREATE_CONNECTION: 5913 // request to send cancel connection 5914 conn->state = SEND_CANCEL_CONNECTION; 5915 hci_run(); 5916 break; 5917 default: 5918 break; 5919 } 5920 return 0; 5921 } 5922 #endif 5923 5924 #ifdef ENABLE_LE_CENTRAL 5925 /** 5926 * @brief Set connection parameters for outgoing connections 5927 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5928 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5929 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5930 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5931 * @param conn_latency, default: 4 5932 * @param supervision_timeout (unit: 10ms), default: 720 ms 5933 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5934 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5935 */ 5936 5937 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5938 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5939 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5940 hci_stack->le_connection_scan_interval = conn_scan_interval; 5941 hci_stack->le_connection_scan_window = conn_scan_window; 5942 hci_stack->le_connection_interval_min = conn_interval_min; 5943 hci_stack->le_connection_interval_max = conn_interval_max; 5944 hci_stack->le_connection_latency = conn_latency; 5945 hci_stack->le_supervision_timeout = supervision_timeout; 5946 hci_stack->le_minimum_ce_length = min_ce_length; 5947 hci_stack->le_maximum_ce_length = max_ce_length; 5948 } 5949 #endif 5950 5951 /** 5952 * @brief Updates the connection parameters for a given LE connection 5953 * @param handle 5954 * @param conn_interval_min (unit: 1.25ms) 5955 * @param conn_interval_max (unit: 1.25ms) 5956 * @param conn_latency 5957 * @param supervision_timeout (unit: 10ms) 5958 * @returns 0 if ok 5959 */ 5960 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5961 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5962 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5963 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5964 connection->le_conn_interval_min = conn_interval_min; 5965 connection->le_conn_interval_max = conn_interval_max; 5966 connection->le_conn_latency = conn_latency; 5967 connection->le_supervision_timeout = supervision_timeout; 5968 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5969 hci_run(); 5970 return 0; 5971 } 5972 5973 /** 5974 * @brief Request an update of the connection parameter for a given LE connection 5975 * @param handle 5976 * @param conn_interval_min (unit: 1.25ms) 5977 * @param conn_interval_max (unit: 1.25ms) 5978 * @param conn_latency 5979 * @param supervision_timeout (unit: 10ms) 5980 * @returns 0 if ok 5981 */ 5982 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5983 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5984 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5985 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5986 connection->le_conn_interval_min = conn_interval_min; 5987 connection->le_conn_interval_max = conn_interval_max; 5988 connection->le_conn_latency = conn_latency; 5989 connection->le_supervision_timeout = supervision_timeout; 5990 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5991 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5992 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5993 return 0; 5994 } 5995 5996 #ifdef ENABLE_LE_PERIPHERAL 5997 5998 /** 5999 * @brief Set Advertisement Data 6000 * @param advertising_data_length 6001 * @param advertising_data (max 31 octets) 6002 * @note data is not copied, pointer has to stay valid 6003 */ 6004 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6005 hci_stack->le_advertisements_data_len = advertising_data_length; 6006 hci_stack->le_advertisements_data = advertising_data; 6007 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6008 hci_run(); 6009 } 6010 6011 /** 6012 * @brief Set Scan Response Data 6013 * @param advertising_data_length 6014 * @param advertising_data (max 31 octets) 6015 * @note data is not copied, pointer has to stay valid 6016 */ 6017 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6018 hci_stack->le_scan_response_data_len = scan_response_data_length; 6019 hci_stack->le_scan_response_data = scan_response_data; 6020 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6021 hci_run(); 6022 } 6023 6024 /** 6025 * @brief Set Advertisement Parameters 6026 * @param adv_int_min 6027 * @param adv_int_max 6028 * @param adv_type 6029 * @param direct_address_type 6030 * @param direct_address 6031 * @param channel_map 6032 * @param filter_policy 6033 * 6034 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6035 */ 6036 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6037 uint8_t direct_address_typ, bd_addr_t direct_address, 6038 uint8_t channel_map, uint8_t filter_policy) { 6039 6040 hci_stack->le_advertisements_interval_min = adv_int_min; 6041 hci_stack->le_advertisements_interval_max = adv_int_max; 6042 hci_stack->le_advertisements_type = adv_type; 6043 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6044 hci_stack->le_advertisements_channel_map = channel_map; 6045 hci_stack->le_advertisements_filter_policy = filter_policy; 6046 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6047 6); 6048 6049 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6050 hci_run(); 6051 } 6052 6053 /** 6054 * @brief Enable/Disable Advertisements 6055 * @param enabled 6056 */ 6057 void gap_advertisements_enable(int enabled){ 6058 hci_stack->le_advertisements_enabled = enabled != 0; 6059 hci_update_advertisements_enabled_for_current_roles(); 6060 hci_run(); 6061 } 6062 6063 #endif 6064 6065 void hci_le_set_own_address_type(uint8_t own_address_type){ 6066 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6067 if (own_address_type == hci_stack->le_own_addr_type) return; 6068 hci_stack->le_own_addr_type = own_address_type; 6069 6070 #ifdef ENABLE_LE_PERIPHERAL 6071 // update advertisement parameters, too 6072 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6073 hci_run(); 6074 #endif 6075 #ifdef ENABLE_LE_CENTRAL 6076 // note: we don't update scan parameters or modify ongoing connection attempts 6077 #endif 6078 } 6079 6080 #endif 6081 6082 uint8_t gap_disconnect(hci_con_handle_t handle){ 6083 hci_connection_t * conn = hci_connection_for_handle(handle); 6084 if (!conn){ 6085 hci_emit_disconnection_complete(handle, 0); 6086 return 0; 6087 } 6088 // ignore if already disconnected 6089 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6090 return 0; 6091 } 6092 conn->state = SEND_DISCONNECT; 6093 hci_run(); 6094 return 0; 6095 } 6096 6097 int gap_read_rssi(hci_con_handle_t con_handle){ 6098 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6099 if (hci_connection == NULL) return 0; 6100 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6101 hci_run(); 6102 return 1; 6103 } 6104 6105 /** 6106 * @brief Get connection type 6107 * @param con_handle 6108 * @result connection_type 6109 */ 6110 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6111 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6112 if (!conn) return GAP_CONNECTION_INVALID; 6113 switch (conn->address_type){ 6114 case BD_ADDR_TYPE_LE_PUBLIC: 6115 case BD_ADDR_TYPE_LE_RANDOM: 6116 return GAP_CONNECTION_LE; 6117 case BD_ADDR_TYPE_SCO: 6118 return GAP_CONNECTION_SCO; 6119 case BD_ADDR_TYPE_ACL: 6120 return GAP_CONNECTION_ACL; 6121 default: 6122 return GAP_CONNECTION_INVALID; 6123 } 6124 } 6125 6126 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6127 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6128 if (!conn) return HCI_ROLE_INVALID; 6129 return (hci_role_t) conn->role; 6130 } 6131 6132 6133 #ifdef ENABLE_CLASSIC 6134 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6135 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6136 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6137 conn->request_role = role; 6138 hci_run(); 6139 return ERROR_CODE_SUCCESS; 6140 } 6141 #endif 6142 6143 #ifdef ENABLE_BLE 6144 6145 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 6146 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6147 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6148 6149 conn->le_phy_update_all_phys = all_phys; 6150 conn->le_phy_update_tx_phys = tx_phys; 6151 conn->le_phy_update_rx_phys = rx_phys; 6152 conn->le_phy_update_phy_options = phy_options; 6153 6154 hci_run(); 6155 6156 return 0; 6157 } 6158 6159 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6160 // check if already in list 6161 btstack_linked_list_iterator_t it; 6162 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6163 while (btstack_linked_list_iterator_has_next(&it)) { 6164 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6165 if (entry->address_type != address_type) { 6166 continue; 6167 } 6168 if (memcmp(entry->address, address, 6) != 0) { 6169 continue; 6170 } 6171 // disallow if already scheduled to add 6172 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6173 return ERROR_CODE_COMMAND_DISALLOWED; 6174 } 6175 // still on controller, but scheduled to remove -> re-add 6176 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6177 return ERROR_CODE_SUCCESS; 6178 } 6179 // alloc and add to list 6180 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6181 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6182 entry->address_type = address_type; 6183 (void)memcpy(entry->address, address, 6); 6184 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6185 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6186 return ERROR_CODE_SUCCESS; 6187 } 6188 6189 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6190 btstack_linked_list_iterator_t it; 6191 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6192 while (btstack_linked_list_iterator_has_next(&it)){ 6193 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6194 if (entry->address_type != address_type) { 6195 continue; 6196 } 6197 if (memcmp(entry->address, address, 6) != 0) { 6198 continue; 6199 } 6200 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6201 // remove from controller if already present 6202 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6203 } else { 6204 // directly remove entry from whitelist 6205 btstack_linked_list_iterator_remove(&it); 6206 btstack_memory_whitelist_entry_free(entry); 6207 } 6208 return ERROR_CODE_SUCCESS; 6209 } 6210 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6211 } 6212 6213 static void hci_whitelist_clear(void){ 6214 btstack_linked_list_iterator_t it; 6215 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6216 while (btstack_linked_list_iterator_has_next(&it)){ 6217 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6218 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6219 // remove from controller if already present 6220 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6221 continue; 6222 } 6223 // directly remove entry from whitelist 6224 btstack_linked_list_iterator_remove(&it); 6225 btstack_memory_whitelist_entry_free(entry); 6226 } 6227 } 6228 6229 /** 6230 * @brief Clear Whitelist 6231 * @returns 0 if ok 6232 */ 6233 uint8_t gap_whitelist_clear(void){ 6234 hci_whitelist_clear(); 6235 hci_run(); 6236 return ERROR_CODE_SUCCESS; 6237 } 6238 6239 /** 6240 * @brief Add Device to Whitelist 6241 * @param address_typ 6242 * @param address 6243 * @returns 0 if ok 6244 */ 6245 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6246 uint8_t status = hci_whitelist_add(address_type, address); 6247 if (status){ 6248 return status; 6249 } 6250 hci_run(); 6251 return ERROR_CODE_SUCCESS; 6252 } 6253 6254 /** 6255 * @brief Remove Device from Whitelist 6256 * @param address_typ 6257 * @param address 6258 * @returns 0 if ok 6259 */ 6260 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6261 uint8_t status = hci_whitelist_remove(address_type, address); 6262 if (status){ 6263 return status; 6264 } 6265 hci_run(); 6266 return ERROR_CODE_SUCCESS; 6267 } 6268 6269 #ifdef ENABLE_LE_CENTRAL 6270 /** 6271 * @brief Connect with Whitelist 6272 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6273 * @returns - if ok 6274 */ 6275 uint8_t gap_connect_with_whitelist(void){ 6276 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6277 return ERROR_CODE_COMMAND_DISALLOWED; 6278 } 6279 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6280 hci_run(); 6281 return ERROR_CODE_SUCCESS; 6282 } 6283 6284 /** 6285 * @brief Auto Connection Establishment - Start Connecting to device 6286 * @param address_typ 6287 * @param address 6288 * @returns 0 if ok 6289 */ 6290 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6291 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6292 return ERROR_CODE_COMMAND_DISALLOWED; 6293 } 6294 6295 uint8_t status = hci_whitelist_add(address_type, address); 6296 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6297 return status; 6298 } 6299 6300 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6301 6302 hci_run(); 6303 return ERROR_CODE_SUCCESS; 6304 } 6305 6306 /** 6307 * @brief Auto Connection Establishment - Stop Connecting to device 6308 * @param address_typ 6309 * @param address 6310 * @returns 0 if ok 6311 */ 6312 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6313 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6314 return ERROR_CODE_COMMAND_DISALLOWED; 6315 } 6316 6317 hci_whitelist_remove(address_type, address); 6318 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6319 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6320 } 6321 hci_run(); 6322 return 0; 6323 } 6324 6325 /** 6326 * @brief Auto Connection Establishment - Stop everything 6327 * @note Convenience function to stop all active auto connection attempts 6328 */ 6329 uint8_t gap_auto_connection_stop_all(void){ 6330 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6331 return ERROR_CODE_COMMAND_DISALLOWED; 6332 } 6333 hci_whitelist_clear(); 6334 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6335 hci_run(); 6336 return ERROR_CODE_SUCCESS; 6337 } 6338 6339 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6340 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6341 if (!conn) return 0; 6342 return conn->le_connection_interval; 6343 } 6344 #endif 6345 #endif 6346 6347 #ifdef ENABLE_CLASSIC 6348 /** 6349 * @brief Set Extended Inquiry Response data 6350 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6351 * @note has to be done before stack starts up 6352 */ 6353 void gap_set_extended_inquiry_response(const uint8_t * data){ 6354 hci_stack->eir_data = data; 6355 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6356 hci_run(); 6357 } 6358 6359 /** 6360 * @brief Start GAP Classic Inquiry 6361 * @param duration in 1.28s units 6362 * @return 0 if ok 6363 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6364 */ 6365 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6366 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6367 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6368 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6369 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6370 } 6371 hci_stack->inquiry_state = duration_in_1280ms_units; 6372 hci_run(); 6373 return 0; 6374 } 6375 6376 /** 6377 * @brief Stop GAP Classic Inquiry 6378 * @returns 0 if ok 6379 */ 6380 int gap_inquiry_stop(void){ 6381 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6382 // emit inquiry complete event, before it even started 6383 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6384 hci_emit_event(event, sizeof(event), 1); 6385 return 0; 6386 } 6387 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6388 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6389 hci_run(); 6390 return 0; 6391 } 6392 6393 void gap_inquiry_set_lap(uint32_t lap){ 6394 hci_stack->inquiry_lap = lap; 6395 } 6396 6397 6398 /** 6399 * @brief Remote Name Request 6400 * @param addr 6401 * @param page_scan_repetition_mode 6402 * @param clock_offset only used when bit 15 is set 6403 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6404 */ 6405 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6406 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6407 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6408 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6409 hci_stack->remote_name_clock_offset = clock_offset; 6410 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6411 hci_run(); 6412 return 0; 6413 } 6414 6415 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6416 hci_stack->gap_pairing_state = state; 6417 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6418 hci_run(); 6419 return 0; 6420 } 6421 6422 /** 6423 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6424 * @param addr 6425 * @param pin_data 6426 * @param pin_len 6427 * @return 0 if ok 6428 */ 6429 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6430 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6431 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6432 hci_stack->gap_pairing_pin_len = pin_len; 6433 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6434 } 6435 6436 /** 6437 * @brief Legacy Pairing Pin Code Response 6438 * @param addr 6439 * @param pin 6440 * @return 0 if ok 6441 */ 6442 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6443 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6444 } 6445 6446 /** 6447 * @brief Abort Legacy Pairing 6448 * @param addr 6449 * @param pin 6450 * @return 0 if ok 6451 */ 6452 int gap_pin_code_negative(bd_addr_t addr){ 6453 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6454 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6455 } 6456 6457 /** 6458 * @brief SSP Passkey Response 6459 * @param addr 6460 * @param passkey 6461 * @return 0 if ok 6462 */ 6463 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6464 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6465 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6466 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6467 } 6468 6469 /** 6470 * @brief Abort SSP Passkey Entry/Pairing 6471 * @param addr 6472 * @param pin 6473 * @return 0 if ok 6474 */ 6475 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6476 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6477 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6478 } 6479 6480 /** 6481 * @brief Accept SSP Numeric Comparison 6482 * @param addr 6483 * @param passkey 6484 * @return 0 if ok 6485 */ 6486 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6487 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6488 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6489 } 6490 6491 /** 6492 * @brief Abort SSP Numeric Comparison/Pairing 6493 * @param addr 6494 * @param pin 6495 * @return 0 if ok 6496 */ 6497 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6498 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6499 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6500 } 6501 6502 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6503 6504 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6505 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6506 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6507 connectionSetAuthenticationFlags(conn, flag); 6508 hci_run(); 6509 return ERROR_CODE_SUCCESS; 6510 } 6511 6512 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6513 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6514 } 6515 6516 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6517 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6518 } 6519 #endif 6520 6521 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6522 /** 6523 * @brief Report Remote OOB Data 6524 * @param bd_addr 6525 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6526 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6527 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6528 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6529 */ 6530 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 6531 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6532 if (connection == NULL) { 6533 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6534 } 6535 connection->classic_oob_c_192 = c_192; 6536 connection->classic_oob_r_192 = r_192; 6537 6538 // ignore P-256 if not supported by us 6539 if (hci_stack->secure_connections_active){ 6540 connection->classic_oob_c_256 = c_256; 6541 connection->classic_oob_r_256 = r_256; 6542 } 6543 6544 return ERROR_CODE_SUCCESS; 6545 } 6546 /** 6547 * @brief Generate new OOB data 6548 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6549 */ 6550 void gap_ssp_generate_oob_data(void){ 6551 hci_stack->classic_read_local_oob_data = true; 6552 hci_run(); 6553 } 6554 6555 #endif 6556 6557 /** 6558 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6559 * @param inquiry_mode see bluetooth_defines.h 6560 */ 6561 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6562 hci_stack->inquiry_mode = inquiry_mode; 6563 } 6564 6565 /** 6566 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6567 */ 6568 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6569 hci_stack->sco_voice_setting = voice_setting; 6570 } 6571 6572 /** 6573 * @brief Get SCO Voice Setting 6574 * @return current voice setting 6575 */ 6576 uint16_t hci_get_sco_voice_setting(void){ 6577 return hci_stack->sco_voice_setting; 6578 } 6579 6580 static int hci_have_usb_transport(void){ 6581 if (!hci_stack->hci_transport) return 0; 6582 const char * transport_name = hci_stack->hci_transport->name; 6583 if (!transport_name) return 0; 6584 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6585 } 6586 6587 /** @brief Get SCO packet length for current SCO Voice setting 6588 * @note Using SCO packets of the exact length is required for USB transfer 6589 * @return Length of SCO packets in bytes (not audio frames) 6590 */ 6591 uint16_t hci_get_sco_packet_length(void){ 6592 uint16_t sco_packet_length = 0; 6593 6594 #ifdef ENABLE_SCO_OVER_HCI 6595 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6596 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6597 6598 if (hci_have_usb_transport()){ 6599 // see Core Spec for H2 USB Transfer. 6600 // 3 byte SCO header + 24 bytes per connection 6601 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6602 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6603 } else { 6604 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6605 sco_packet_length = 3 + 60 * multiplier; 6606 // assert that it still fits inside an SCO buffer 6607 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6608 sco_packet_length = 3 + 60; 6609 } 6610 } 6611 #endif 6612 6613 #ifdef HAVE_SCO_TRANSPORT 6614 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6615 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6616 sco_packet_length = 3 + 60 * multiplier; 6617 #endif 6618 return sco_packet_length; 6619 } 6620 6621 /** 6622 * @brief Sets the master/slave policy 6623 * @param policy (0: attempt to become master, 1: let connecting device decide) 6624 */ 6625 void hci_set_master_slave_policy(uint8_t policy){ 6626 hci_stack->master_slave_policy = policy; 6627 } 6628 6629 #endif 6630 6631 HCI_STATE hci_get_state(void){ 6632 return hci_stack->state; 6633 } 6634 6635 #ifdef ENABLE_CLASSIC 6636 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6637 hci_stack->gap_classic_accept_callback = accept_callback; 6638 } 6639 #endif 6640 6641 /** 6642 * @brief Set callback for Bluetooth Hardware Error 6643 */ 6644 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6645 hci_stack->hardware_error_callback = fn; 6646 } 6647 6648 void hci_disconnect_all(void){ 6649 btstack_linked_list_iterator_t it; 6650 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6651 while (btstack_linked_list_iterator_has_next(&it)){ 6652 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6653 if (con->state == SENT_DISCONNECT) continue; 6654 con->state = SEND_DISCONNECT; 6655 } 6656 hci_run(); 6657 } 6658 6659 uint16_t hci_get_manufacturer(void){ 6660 return hci_stack->manufacturer; 6661 } 6662 6663 #ifdef ENABLE_BLE 6664 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6665 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6666 if (!hci_con) return NULL; 6667 return &hci_con->sm_connection; 6668 } 6669 6670 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6671 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6672 #endif 6673 6674 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6675 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6676 if (hci_connection == NULL) return 0; 6677 if (hci_is_le_connection(hci_connection)){ 6678 #ifdef ENABLE_BLE 6679 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6680 if (sm_conn->sm_connection_encrypted) { 6681 return sm_conn->sm_actual_encryption_key_size; 6682 } 6683 #endif 6684 } else { 6685 #ifdef ENABLE_CLASSIC 6686 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6687 return hci_connection->encryption_key_size; 6688 } 6689 #endif 6690 } 6691 return 0; 6692 } 6693 6694 int gap_authenticated(hci_con_handle_t con_handle){ 6695 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6696 if (hci_connection == NULL) return 0; 6697 6698 switch (hci_connection->address_type){ 6699 #ifdef ENABLE_BLE 6700 case BD_ADDR_TYPE_LE_PUBLIC: 6701 case BD_ADDR_TYPE_LE_RANDOM: 6702 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6703 return hci_connection->sm_connection.sm_connection_authenticated; 6704 #endif 6705 #ifdef ENABLE_CLASSIC 6706 case BD_ADDR_TYPE_SCO: 6707 case BD_ADDR_TYPE_ACL: 6708 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6709 #endif 6710 default: 6711 return 0; 6712 } 6713 } 6714 6715 int gap_secure_connection(hci_con_handle_t con_handle){ 6716 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6717 if (hci_connection == NULL) return 0; 6718 6719 switch (hci_connection->address_type){ 6720 #ifdef ENABLE_BLE 6721 case BD_ADDR_TYPE_LE_PUBLIC: 6722 case BD_ADDR_TYPE_LE_RANDOM: 6723 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6724 return hci_connection->sm_connection.sm_connection_sc; 6725 #endif 6726 #ifdef ENABLE_CLASSIC 6727 case BD_ADDR_TYPE_SCO: 6728 case BD_ADDR_TYPE_ACL: 6729 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6730 #endif 6731 default: 6732 return 0; 6733 } 6734 } 6735 6736 bool gap_bonded(hci_con_handle_t con_handle){ 6737 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6738 if (hci_connection == NULL) return 0; 6739 6740 #ifdef ENABLE_CLASSIC 6741 link_key_t link_key; 6742 link_key_type_t link_key_type; 6743 #endif 6744 switch (hci_connection->address_type){ 6745 #ifdef ENABLE_BLE 6746 case BD_ADDR_TYPE_LE_PUBLIC: 6747 case BD_ADDR_TYPE_LE_RANDOM: 6748 return hci_connection->sm_connection.sm_le_db_index >= 0; 6749 #endif 6750 #ifdef ENABLE_CLASSIC 6751 case BD_ADDR_TYPE_SCO: 6752 case BD_ADDR_TYPE_ACL: 6753 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6754 #endif 6755 default: 6756 return false; 6757 } 6758 } 6759 6760 #ifdef ENABLE_BLE 6761 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6762 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6763 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6764 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6765 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6766 return sm_conn->sm_connection_authorization_state; 6767 } 6768 #endif 6769 6770 #ifdef ENABLE_CLASSIC 6771 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 6772 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6773 if (!conn) return GAP_CONNECTION_INVALID; 6774 conn->sniff_min_interval = sniff_min_interval; 6775 conn->sniff_max_interval = sniff_max_interval; 6776 conn->sniff_attempt = sniff_attempt; 6777 conn->sniff_timeout = sniff_timeout; 6778 hci_run(); 6779 return 0; 6780 } 6781 6782 /** 6783 * @brief Exit Sniff mode 6784 * @param con_handle 6785 @ @return 0 if ok 6786 */ 6787 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6788 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6789 if (!conn) return GAP_CONNECTION_INVALID; 6790 conn->sniff_min_interval = 0xffff; 6791 hci_run(); 6792 return 0; 6793 } 6794 6795 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 6796 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6797 if (!conn) return GAP_CONNECTION_INVALID; 6798 conn->sniff_subrating_max_latency = max_latency; 6799 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6800 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6801 hci_run(); 6802 return ERROR_CODE_SUCCESS; 6803 } 6804 6805 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 6806 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6807 if (!conn) return GAP_CONNECTION_INVALID; 6808 conn->qos_service_type = service_type; 6809 conn->qos_token_rate = token_rate; 6810 conn->qos_peak_bandwidth = peak_bandwidth; 6811 conn->qos_latency = latency; 6812 conn->qos_delay_variation = delay_variation; 6813 hci_run(); 6814 return ERROR_CODE_SUCCESS; 6815 } 6816 6817 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6818 hci_stack->new_page_scan_interval = page_scan_interval; 6819 hci_stack->new_page_scan_window = page_scan_window; 6820 hci_run(); 6821 } 6822 6823 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6824 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6825 hci_run(); 6826 } 6827 6828 #endif 6829 6830 void hci_halting_defer(void){ 6831 if (hci_stack->state != HCI_STATE_HALTING) return; 6832 switch (hci_stack->substate){ 6833 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6834 case HCI_HALTING_CLOSE: 6835 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6836 break; 6837 default: 6838 break; 6839 } 6840 } 6841 6842 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6843 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6844 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6845 if (le_device_db_index >= le_device_db_max_count()) return; 6846 uint8_t offset = le_device_db_index >> 3; 6847 uint8_t mask = 1 << (le_device_db_index & 7); 6848 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6849 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6850 // note: go back to remove entries, otherwise, a remove + add will skip the add 6851 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6852 } 6853 } 6854 6855 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6856 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6857 if (le_device_db_index >= le_device_db_max_count()) return; 6858 uint8_t offset = le_device_db_index >> 3; 6859 uint8_t mask = 1 << (le_device_db_index & 7); 6860 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6861 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6862 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6863 } 6864 } 6865 6866 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6867 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6868 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6869 } 6870 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6871 // restart le resolving list update 6872 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6873 } 6874 return ERROR_CODE_SUCCESS; 6875 } 6876 #endif 6877 6878 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6879 void hci_setup_test_connections_fuzz(void){ 6880 hci_connection_t * conn; 6881 6882 // default address: 66:55:44:33:00:01 6883 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6884 6885 // setup Controller info 6886 hci_stack->num_cmd_packets = 255; 6887 hci_stack->acl_packets_total_num = 255; 6888 6889 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6890 addr[5] = 0x01; 6891 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6892 conn->con_handle = addr[5]; 6893 conn->role = HCI_ROLE_SLAVE; 6894 conn->state = RECEIVED_CONNECTION_REQUEST; 6895 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6896 6897 // setup incoming Classic SCO connection with con handle 0x0002 6898 addr[5] = 0x02; 6899 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6900 conn->con_handle = addr[5]; 6901 conn->role = HCI_ROLE_SLAVE; 6902 conn->state = RECEIVED_CONNECTION_REQUEST; 6903 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6904 6905 // setup ready Classic ACL connection with con handle 0x0003 6906 addr[5] = 0x03; 6907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6908 conn->con_handle = addr[5]; 6909 conn->role = HCI_ROLE_SLAVE; 6910 conn->state = OPEN; 6911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6912 6913 // setup ready Classic SCO connection with con handle 0x0004 6914 addr[5] = 0x04; 6915 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6916 conn->con_handle = addr[5]; 6917 conn->role = HCI_ROLE_SLAVE; 6918 conn->state = OPEN; 6919 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6920 6921 // setup ready LE ACL connection with con handle 0x005 and public address 6922 addr[5] = 0x05; 6923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6924 conn->con_handle = addr[5]; 6925 conn->role = HCI_ROLE_SLAVE; 6926 conn->state = OPEN; 6927 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6928 conn->sm_connection.sm_connection_encrypted = 1; 6929 } 6930 6931 void hci_free_connections_fuzz(void){ 6932 btstack_linked_list_iterator_t it; 6933 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6934 while (btstack_linked_list_iterator_has_next(&it)){ 6935 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6936 btstack_linked_list_iterator_remove(&it); 6937 btstack_memory_hci_connection_free(con); 6938 } 6939 } 6940 void hci_simulate_working_fuzz(void){ 6941 hci_init_done(); 6942 hci_stack->num_cmd_packets = 255; 6943 } 6944 #endif 6945